A.D.
     From the Latin, "Anno Domini," which means in the year of our Lord.  The Western Calendar is dated from the birth of Christ.  Therefore, 2000 A.D. means 2000 years after the birth of Jesus.

A priori
     Knowledge, judgments, and principles which are true without verification or testing.  It is universally true.  

Abaddon
     The Hebrew word for "destroyer" whose Greek equivalent was "Apollyon."  Abaddon is the satanic angel of the Abyss (Rev. 9:11 ). 

Absolution
     In Catholicism,  the act of releasing someone from their sin by God, through the means of a priest. 

Abyss
     The abode of the dead and the place where evil spirits are imprisoned (Rev. 9:1-11).

Active Obedience
     As distinguished from passive obedience in Reformed Theology.  Active obedience is Jesus' actively fulfilling all the law of God.  This active obedience is imputed to the believer when he believes; that is, God reckons to the believer the righteousness of Christ when the believer trusts in Christ and His work.

Adiaphora
      Teachings and practices that are neither commanded nor forbidden in scripture.  An example might be whether or not to use a sound-board in a church, to meet in a tent or a building, to have two or more services or simply one on the day of worship.

Adoptionism
      Adoptionism is an error concerning Jesus that first appeared in the second century. Those who held it denied the preexistence of Christ and, therefore, His deity. Adoptionists taught that Jesus was tested by God and after passing this test and upon His baptism He was granted supernatural powers by God and adopted as the Son. As a reward for His great accomplishments and perfect character Jesus was raised from the dead and adopted into the Godhead. Please see Heresies for more information.

Advent
      From the Latin, “coming.” The coming of or the arrival of something very important as in the advent of Christ’s return. Advent is also a Christian time of preparation preceding Christmas.

Agnosticism
     The belief that it is not possible to know if there is or is not a God. (Compare Atheism, Deism, and Theism.) 

Albigenses
      A heresy during the middle ages that developed in the town Albi in Southern France. This error taught that there were two gods: the good god of light usually referred to as Jesus in the New Testament and the god of darkness and evil usually associated with Satan and the "God of the Old Testament." Anything material was considered evil including the body which was created by Satan. The soul, created by the good god, was imprisoned in the evil flesh and salvation was possible only through holy living and doing good works. Please see Heresies for more information.

Amillennialism
     The teaching that there is no literal 1000 year reign of Christ as referenced in Revelation 20. It sees the 1000 year period spoken of in Revelation 20 as figurative. Instead, it teaches that we are in the millennium now, and that at the return of Christ (1 Thess. 4:16 - 5:2) there will be the final judgment and the heavens and the earth will then be destroyed and remade (2 Pet. 3:10). The Amillennial view is as old as the Premillennial view. (Also compare to Postmillennialism). 

Anabaptists
     Any of a group of sects of the early Reformation period of the 16th century that believed in rebaptism of people as adults. Infant baptism was not recognized as valid and the Catholic Mass was rejected. Anabaptist means “one who baptizes again.” They believed in non-violence and opposed state run churches.

Angel
      Angel means messenger. Angels are created (Psalm 148:2,5; Col. 1:16), non-human, spirit beings (Heb. 1:14). They are immortal (Luke 20:36), innumerable (Heb. 12:22), invisible (Num. 22:22-31), sexless (Matt. 22:30), and do the will of God (Psalm 103:20). These angels have a ministry to believers. They guide (Gen. 24:7, 40), protect (Psalm 34:7), and comfort (Acts 27:2, 24).
      There are good angels (Gen. 28:12; Psalm 91:11) and bad angels (2 Pet. 2:4; Jude 6). The only angels mentioned by name are Gabriel (Dan. 8:16; 9:21 ), Michael (Dan. 10:13,21; 112:1), and Lucifer (Luke 10:18). Michael is always mentioned in the context of battle (Dan. 10:13) and Gabriel as a messenger (Luke 1:26). Of course, Lucifer, who became Satan, is the one who opposes God.
      Angels were originally created for the purpose of serving and carrying out the will of God. The fallen angels rebelled and became evil angels. Satan is such an angel (Isaiah 14:12-16; Ezekiel 28:12-15).

Animism
     The belief that everything in the universe contains a living soul.  The belief that every object is indwelt by a spirit.

Annihilationism
     The teaching that when a person dies, he is annihilated, most often this doctrine is applied to the wicked, thereby negating eternal hell fire. This is contradicted by the Bible in Matt. 25:46 which says “And these will go away into eternal punishment, but the righteous into eternal life.” Also, degrees of punishment will be given on the Day of Judgment (Rev. 20:11-15). If all, or only the wicked are annihilated, then degrees of punishment would be pointless.

Anthropic Principle
     The idea that the universe exhibits elements of design specifically for the purpose of containing intelligent beings; namely, humans.  Much debate surrounds this issue.  Is the universe necessarily arranged by God so as to make life possible or is it simply that the universe is godless and that life came into existence due to the chance state that we now find it in?   

Anthropomorphic  
     Manifesting in human form.  It is from the Greek "anthropos" meaning "man" and "morphe" meaning "form."  In biblical theology, God is described in anthropomorphic terms; that is, in human terms with human attributes.  For example, God has hands and feet in Exodus 24:9-11 and is loving (1 John 4:8).

Antichrist
     A figure who opposes God. The word is used to describe a spirit of rebellion against God, "...the spirit of the Antichrist..." (1 John 4:3) and of a specific future person identified as the man of lawlessness (2 Thess. 2:3). He actively opposes Christ (2 Thess. 2:4) and when he arrives, he will be able to perform miracles (2 Thess. 2:9). Some believe he will be an incarnation of Satan and as such will be able to deceive many. His number is 666 (Rev. 13:18). A further possible description of him might be found in Zech. 11:15-17).

Antinomianism
      The word comes from the Greek anti, against, and nomos, law. It is the unbiblical practice of living without regard to the righteousness of God, using God's grace as a license to sin, and trusting grace to cleanse of sin. In other words, since grace is infinite and we are saved by grace, then we can sin all we want and still be saved. It is wrong because even though as Christians we are not under the Law (Rom. 6:14), we still fulfill the Law in the Law of love (Rom. 13:8,10; Gal. 5:14; 6:2). We are to love God with all our heart, soul, strength, and mind, and our neighbor as ourselves (Luke 10:27) and, thereby, avoid the offense of sin which cost God His only begotten Son. Paul speaks against the concept of antinomianism in Rom. 6:1-2: "Are we to continue in sin that grace may abound? May it never be! How shall we who died to sin still live in it?". We are not to use the grace of God as a means of sin. Instead, we are to be controlled by the love of God and in that way bear the fruit of the Holy Spirit (Gal. 5:22-25).

Apollyon
     Greek for "destroyer."  He is the angel of the Abyss, "They have as king over them, the angel of the abyss; his name in Hebrew is Abaddon, and in the Greek he has the name Apollyon," (Rev. 9:11 ).

Apparition
     An unexpected, supernatural appearance of a ghost or a person.  Folklore of apparitions are particularly strong among Catholics who claim appearances of the saints, Mary, and Jesus with messages of repentance and turning to the Catholic sacraments and confession.

Apocalypse
     From the Greek word for "revelation," or "unveiling."  It is synonymous with Armageddon and refers to those future things dealing with the return of Christ and the great battle of Armageddon.

Apocrypha
     The word apocrypha means hidden. It is used in a general sense to describe a list of books written by Jews between 300 and 100 B.C. More specifically, it is used of the seven additional books accepted by the Catholic church as being inspired. The entire list of books of the apocrypha are: 1 Esdras, 2 Esdras, Tobit, Judith, the Rest of Esther, the Wisdom of Solomon, Sirach, (also titled Ecclesiasticus), Baruch, The Letter of Jeremiah, Song of the Three Young Men, Susanna, Bel and the Dragon, The Additions to Daniel, The Prayer of Manasseh, and 1 and 2 Maccabees.
     The books accepted as inspired and included in the Catholic Bible are Tobit, Judith, 1 and 2 Maccabees Wisdom of Solomon Sirach (also known as Ecclesiasticus), and Baruch
     The Jews never recognized these books as being canonical (inspired). There is no record that Jesus or the apostles ever quoted from the apocryphal books. The Septuagint (LXX) includes the books, not as scripture, but as part of the translation of the Hebrew manuscripts as a whole.

Apollinarianism
     Apollinarianism was the heresy taught by Apollinaris the Younger, bishop of Laodicea in Syria about 361.  He taught that the Logos of God, which became the divine nature of Christ, took the place of the rational human soul of Jesus and that the body of Christ was a glorified form of human nature.  In other words, though Jesus was a man, He did not have a human mind but that the mind of Christ was solely divine.  Please see Heresies for more information.

Apologetics
      The word "apologetics" is derived from the Greek word "apologia," which means to make a defense. It has come to mean defense of the faith. Apologetics covers many areas: who Jesus is, the reliability of the Bible, refuting cults, biblical evidences in the history and archeology, answering objections, etc. In short, it deals with giving reasons for Christianity being the true religion. We are called by God to give an apologia, a defense: "but sanctify Christ as Lord in your hearts, always being ready to make a defense to everyone who asks you to give an account for the hope that is in you, yet with gentleness and reverence" (1 Pet. 3:15).

Apostasy
     The falling away from the faith. It is a revolt against the truth of God’s word by a believer. It can also describe a group or church organization that has "fallen away" from the truths of Christianity as revealed in the Bible.

Apostle
      Someone sent with a special message or commission. Jesus is called the apostle and high Priest of our confession in Hebrews 3:1. The twelve apostles of Jesus were Simon Peter, Andrew, James the son of Zebedee, John, Philip, Bartholomew, Thomas, Matthew, James the son of Alphaeus, Thaddaeus, Simon the Zealot, and Judas Iscariot. Paul became an apostle after Jesus' resurrection (2 Cor. 1:1), along with Barnabas (Acts 14:14), and others.
      Apostles established churches (Rom. 15:17-20), exposed error (Gal. 1:6-9), and defended the truth of the gospel (Phil. 1:7,17). Some were empowered by the Holy Spirit to perform Miracles (Matt. 10:1,8) and they were to preach the gospel (Matt. 28:19,20).

Archangel
     In the Bible, a Greek word found only in the New Testament in two places:  1 Thess. 4:16, "For the Lord Himself will descend from heaven with a shout, with the voice of the archangel, and with the trumpet of God; and the dead in Christ shall rise first"; and Jude 9, "But Michael the archangel, when he disputed with the devil and argued about the body of Moses, did not dare pronounce against him a railing judgment, but said, 'The Lord rebuke you.'"  Archangels seem to of a class of angels of great rank and power.  Apparently, there are three archangels named:  Michael, Gabriel, and Lucifer.

Argument from Design
     An attempt to prove God's existence by arguing that the universe and things in it exhibit attributes of design.  A design must have a designer.  Since the Universe appears designed, it had to have someone who designed it.

Argumentum ad hominem
     An irrelevant attack upon a person to deflect the argument from the facts and reasons.

Argumentum ad judicium
     An argument where appeal is made to common sense and the judgment of people as validating a point.

Argumentum ad populum
     An argument where appeal is made to emotions:  loyalties, patriotism, prejudices, etc.

Argumentum ad verecundiam
     An argument using respect for great men, customs, institutions, and authority in an attempt to strengthen one's argument and provide an illusion of proof.

Arianism
      An ancient theological error that appeared around the year 320. It taught that God could not appear on the earth, that Jesus was not eternal and could not be God. Additionally, it taught that there was only one person in the Godhead: the Father. Jesus, then, was a creation. It was condemned by the Council of Nicea in 325.
      The Jehovah's Witness cult is an equivalent, though not exactly, of this ancient error.   Please see Heresies for more information.

Ark of the Covenant
     Also called the "Ark of the Testimony" (Ex. 30:6), "Ark of God" (1 Sam. 3:3), and the "Ark of the covenant of the Lord" (Deut. 10:8).  The Ark of the Covenant was very sacred to the Ancient Jews.  It was a rectangular box made of Acacia wood about 4 x 1.5 x 1.5 feet.  It was covered with gold and was carried by poles that were inserted into rings located on the four corners.  On top was a lid called "The Mercy Seat" which had two Cherubs with outstretched wings pointing towards each other.  Inside of the Ark were the tablets of the Ten Commandments, a jar of manna, and Aaron's Rod that budded (Heb. 9:4).  It served as the symbol of the very presence of God.  The Ark of the Covenant was place in the Holy of Holies in the Tabernacle and later in the Temple.  Once a year, the High Priest would enter the Holy of Holies and sprinkle blood on the Mercy Seat.  This was symbolic of the forgiveness of the sins of the Jewish nation.

Armageddon
      The word "armageddon" only occurs in Rev. 16:16.  It is the location of the final great battle between good and evil called the Great Day of God Almighty.

Arminianism
      There are five main tenets of Arminianism: 1) God elects or reproves on the basis of foreseen faith or unbelief, 2) Christ died for all men and for every man, although only believers are saved, 3) Man is so depraved that divine grace is necessary unto faith or any good deed, 4) This grace may be resisted, 5) Whether all who are truly regenerate will certainly persevere in the faith is a point which needs further investigation.¹ (Compare with Calvinism)

Ascension
     The bodily taking up of Jesus into the heavens to be at the right hand of God the Father.  The account of Jesus' ascension is record by Luke in Acts 1:4-11.  

Ascended Master
     A New Age term designating a person of great learning and wisdom who lives on the astral plane.  They are not physical beings.  An astral plane is another dimension of reality beyond our world and is outside of time and space.  Supposedly, Jesus, Buddha, Confuscious, etc. were Ascended Masters.

Assumption
     In Catholicism, the taking of the body and soul of Mary, by God, into glory.  Catholic doctrine, apparently, does not state whether or not Mary died, but tradition holds that she died and was immediately afterward assumed into heaven both body and soul.  

Assurance
     Theologically, assurance is the state of being confident in a condition or outcome. Usually it is applied to one’s assurance of salvation. Texts often used to support assurance of salvation are John 10:28 “and I give eternal life to them, and they shall never perish; and no one shall snatch them out of My hand,” and 1 John 5:13, “These things I have written to you who believe in the name of the Son of God, in order that you may know that you have eternal life.”  This assurance is given by the Holy Spirit.

Astral Projection
      In Eastern metaphysical and new age philosophies, astral projection is the practice of the soul leaving the human body and traveling around this world or other planes of existence. 

Astrology
     A system of divination using the positions of stars, planets, and the moon, in the twelve Zodiac signs, as a means to predict the future.  One's birth date falls into a Zodiac sign and this is used in determining predictive events in relation to the astral body positions.  Astrology is very prominent in the New Age.

Atheism
      This word comes from two Greek words, a the negator, and theos, God. Atheism teaches that there is no God of any kind, anywhere, anytime.  Some atheists claim to "exercise no belief in a god" the same way they would exercise no belief in pink unicorns.  Logically, an atheist would be an evolutionist.
      The Bible teaches that all men know there is a God (Rom. 2:14-15). Therefore, they will be without excuse (Rom. 1:20 ) on the Day of Judgment. Instead, atheists willingly suppress the knowledge of God by their unrighteousness (Rom. 1:18-19).

Atonement
      To atone means to make amends, to repair a wrong done. Biblically, it means to remove sin. The Old Testament atonements offered by the high priest were temporary and a foreshadow of the real and final atonement made by Jesus. Jesus atoned for the sins of the world (1 John 2:2).  This atonement is received by faith (Rom. 5:1; Eph. 2:8-9).
     Man is a sinner (Rom. 5:8) and cannot atone for himself. Therefore, it was the love of the Father that sent Jesus (1 John 4:10) to die in our place (1 Pet. 3:18) for our sins (1 Pet. 2:24). Because of the atonement, our fellowship with God is restored (Rom. 5:10). (See Reconciliation.)

Aura
     A term frequently used by New Agers to describe a field of energy emitted by every living thing, particularly people.  This aura takes on different colors depending on the person's mood, state of wellness, etc., and some New Age practitioners claim the ability to interpret the colors and diagnosis various conditions and states of mind of the person with the aura.  See also, Chakra.

Autograph
      An original writing of a biblical document. The original manuscript written. The autographs would be the actual, original written document from which copies are made.

Autonomy
     Freedom from all external constraints.  Independence consisting of self-determination.

Baal
     A Canaanite god.  The word means "lord" or "husband."  He was a god of weather, associated with thunder, which appointed the times of the rains, and was considered to be the son of the pagan god Dagon.  The ancient Jews were often tempted to follow Baal because so much of their lives depended upon the rain that fed the crops.

Babel
     The Hebrew name for Babylon, one of the cities founded by Nimrod.  In Gen. 11:1-9, it is the location where the entire world spoke a single language and worked together to build a tower into the heavens.  It was representative of the great pride of man.  God confused their languages.  The building of the tower ceased and they dispersed.

Babel, Tower of
     The tower built the builders at Babel constructed which became a symbol of their defiance against God (Gen. 11:1-6).  It was probably modeled after a ziggurat which is a mound of sun-dried bricks and was probably constructed before 4,000 BC.

Baptism
      An immersion or sprinkling of water that signifies one's identification with a belief or cause. In Christianity it is the believer's identification with Christ in His death, burial, and resurrection (Rom. 6:4-54). It is done in the name and authority (Acts 4:7) of Christ with the baptismal formula of Father, Son, and Holy Spirit (Matt. 28:19). It does not save us (1 Pet. 3:21).  However, it is our obligation, as believers, to receive it.
      Some maintain that baptism is necessary for salvation. It is not. If you want to read more on this see Is Baptism Necessary for Salvation?

Baptismal Regeneration
     The belief that baptism is essential to salvation, that it is the means where forgiveness of sins is made real to the believer. This is incorrect. Paul said that he came to preach the gospel, not to baptize (1 Cor. 1:14-17). If baptism were essential to salvation, then Paul would have included it in his standard practice and preaching of the salvation message of Jesus, but he did not. (See also Col. 2:10-11.) For more information on this see Is Baptism Necessary for Salvation?

Bible
     A book or collection of sacred writings.  The term "bible" is best known in reference to the Christian Scriptures consisting of the both the Old and New Testaments.  The word comes from the Greek, biblios, meaning "book."  

Blasphemy
      Speaking evil of God or denying Him some good which we should attribute to Him. Blasphemy of the Holy Spirit is stating that Jesus did his miracles by the power of the devil (Matt. 12:22-32) and is an unforgivable sin (Mark 3:28-30). Blasphemy arises out of pride (Psalm 73:9,11), hatred (Psalm 74:18), injustice (Isaiah 52:5), etc. Christ was mistakenly accused of blasphemy (John 10:30-33).

Book of Life
     A book kept by God with the list of names of people who will escape God's wrath (Psalm 69:28; Rev. 21:27).  Those who names are not in the book of Life are cast into hell (Rev. 20:15).

Born Again
     The new birth enjoyed by a Christian upon his conversion and regeneration.  It is a work of the Holy Spirit within a believer.  It is related to faith in Christ and Him crucified (John 3:3-5).  It means that the person is no longer dead in sins (Eph. 2:1), no longer spiritually blind (1 Cor. 2:14), and is now a new creation in Christ Jesus (2 Cor. 5:17).

Bride of Christ
     A symbolic term used to designate the Christian church in its relation to Christ as one who is a pure virgin (2 Cor. 11:2), loved by Christ (Eph. 5:22-33), who will be in the marriage supper to the Lamb (Rev. 19:7).  Rev. 21:9 says, "And one of the seven angels who had the seven bowls full of the seven last plagues, came and spoke with me, saying, "Come here, I shall show you the bride, the wife of the Lamb." 

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1. This information was taken from Baker's Dictionary of Theology, ed. E. Harrison, (Baker Book House, Grand Rapids, Michigan), 1960. p. 64.