Here is the definition of "Apostacy" taken from the section in the Elders manual "Pay Attention to the Flock"
Apostasy.
Apostasy is a standing away from, a falling away, defection, rebellion, abandonment; it involves teaching false
doctrines, supporting or promoting false religion and its holidays or interfaith activities. (Deut. 13:13, 15; Josh.
22:22, ftn.; Acts 21:21, ftn.; 2 Cor. 6:14, 15, 17, 18;2. John 7, 9, 10; Rev. 18:4)
Those with sincere doubts should be helped, dealt with mercifully. (Jude 22, 23; w82 9/1 pp. 20-1;w80 8/1
pp. 21-2)
Apostasy includes action taken against true worship of Jehovah or his established order among his dedicated
people. (Jer. 17:13; 23:15; 28:15, 16; 2 Thess. 2:9, 10)
Persons who deliberately spread (stubbornly hold to and speak about) teachings contrary to Bible truth as taught
by Jehovah's Witnesses are apostates.
If it is learned that a person has taken up association with another religious organization, the matter should be inves-
tigated, and if verified, a committee should be formed.
If it is clearly established that the person has joined another religion and intends to remain with it, the elders would make a brief announcement to the congregation that such- one has disassociated himself. (w86 10/15 p. 31 )
Working secularly for a false religious organization could put one in a position similar to that of one preaching false
doctrine. (2 Cor. 6:14-16)
Celebrating a false religious holiday would be similar to performing any other act of false worship. (Jer. 7:16-19)
The Bible condemns the following:
Causing divisions and promoting sects.
This would be deliberate action disrupting the unity of the congregation or undermining the confidence
of the brothers in Jehovah's arrangement.
It may involve or lead to apostasy. (Rom. 16: 17, 18; Titus 3:10, 11 )
The practice of spiritism. (Deut. 18:9-13; I Cor. 10: 21, 22; Gal. 5:20)
Idolatry. ( I Cor. 6:9, 10; 10:14)
Idolatry includes the possession and use of images and pictures that are employed in false religion.
Drunkenness. (I Cor. 5:11; 6:9,10; it-l p. 656)
Stealing, thievery, fraud. (Lev. 6:2, 4; I Cor. 6:9, 10; Eph. 4:28; it-l p. 870)
Deliberate, malicious lying; bearing false witness. (Prov. 6: 16, 19; Col. 3:9; Rev. 22:15; it-2 pp. 244-5)
Reviling; slander. (Lev. 19:16; I Cor. 6:10; it-l pp. 989-91; it-2 pp. 801-2)
Obscene speech. (Eph. 5:3-5; Col. 3:8)
Failure to abstain from blood. (Gen. 9:4; Acts 15:20, 28, 29)
Greed‹gambling, extortion. (I Cor. 5:10, 11; 6:10; I Tim. 3:8; it-l pp. 1005-6)
Adamant refusal to provide materially for one's ovn family‹leaving wife and children destitute when having the