[ 'hɛrɪsi ]
■ noun ( plural heresies )
1》 belief or opinion contrary to orthodox religious (especially Christian) doctrine.
2》 opinion profoundly at odds with what is generally accepted.
Origin
ME: from OFr. heresie , based on L. haeresis , from Gk hairesis 'choice' (in eccles. Gk 'heretical sect').