Titus 3:10

A man that is an heretick after the first and second admonition reject; Heretic. Heresy, originally a division resulting from self-will; the individual doing and teaching what he chose independently of the church. More aggravated than schism (1 Corinthians 11:19; Galatians 5:20): divisions on church matters not necessarily fundamental (Titus 1:14; 5:9 ). In course of time it came to mean 'heresy' in the modern sense, 'the open espousal of fundamental error.' The heretics of Crete were in doctrine followers of their own self- willed questions (Titus 3:9), and immoral in practice.

Admonition - by word [ nouthesia (G3559): but paideia (G3809), by chastisements]. Reject, [ paraitou (G3868)] - literally, ask off from,: 'shun.' Not formal excommunication, but have nothing more to do with him, either in admonition or conversation.