Hei'nōus, a.

(hā'nus), a. [Fr. haineux, from haine, hatred, O. Fr. haïne, from hair, to hate, O. Fr. haïr, from Goth. hatan, A-S. hatian, O. Sax. hatan, hetian, O. Fries. hatia. See HATE.] Hateful; odious; hence, great; enormous; aggravated; as, a heinous sin or crime.

How heinous had the fact been, how deserving Of blame! Milton.

Synonyms—Enormous; excessive; aggravated; great; monstrous; flagrant; flagitious; atrocious.