|Origin:||heresie, from Late Latin haeresis, from Greek hairesis 'act of taking or choosing'|
her‧e‧sy plural heresies [uncountable and countable]
a belief that disagrees with the official principles of a particular religion:
He was executed for heresy.
a belief, statement etc that disagrees with what a group of people believe to be right:
To come to work without a shirt and tie was considered heresy.