The meaning of Sect in the Bible
(From Easton's Bible Dictionary)

(Gr. hairesis, usually rendered "heresy", Acts 24:14; I Chronicles 11:19; Galatians 5:20, etc.), meaning properly "a choice," then "a chosen manner of life," and then "a religious party," as the "sect" of the Sadducees (Acts 5:17), of the Pharisees (15:5), the Nazarenes, i.e., Christians (24:5). It afterwards came to be used in a bad sense, of those holding pernicious error, divergent forms of belief (II Peter 2:1; Galatians 5:20).

See more on the meaning of Sect in the Bible:
Sect {International Standard Bible Encyclopedia}

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