ETYM New Lat., from Greek, pointedly foolish; oxys sharp + moron foolish.
Conjoining contradictory terms (as in 'deafening silence').
Figure of speech combining contradictory terms.
Rhetorical device of conjoining contradictory words.
Figure of speech, the combination of two or more words that are normally opposites, in order to startle. Bittersweet is an oxymoron, as are cruel to be kind and beloved enemy.