HORN Copy link • HORNPROPR., cornu. A little horn, corniculum: to butt with the horns, cornibus ferire, petere (†); against each other, cornibus inter se luctari (†): to threaten with one’s horns, cornua obvertere alicui, or tollere in aliquem (also, figuratively, of setting one’s self to oppose him): to give anybody a pair of horns, adulterare alicujus uxorem; cum alicujus uxore rem habere: to receive a pair of horns, *decipi uxoris adulterio: of horns, comeus: to turn to horn, cornescere (Plin). By metonymy, what resembles a horn: (a) the horns of the moon, cornua lunae; (b) a drinking-horn, cornu; (c) wind instrument, cornu: buccina [Vid: TRUMPET]. To blow the horn, cornu or buccinam inflare.