Heresy

Choice, chosen way of life or faith, sect, school, party. The Greek word properly designates any sect or party, without implying praise or censure. So in Ac 5:17 15:5 26:4,5. In the epistles it denotes a sect or party in a bad sense, implying a refractory spirit, as well as error in faith and practice, 1Co 11:19Ga 5:202Pe 2:1. After the primitive age, the word came to signify simply error in doctrine.