bicorn n a cocked hat with the brim turned up to form two points s having two horns or horn-shaped parts a bicornuate uterus Usage(s) In the Moroccan capital of Rabat last week, a strapping black African sentry, resplendent in scarlet uniform, white puttees and black-tasseled bicorn, paced slowly back and forth . Synonym(s) bicorne bicorned bicornate bicornuate bicornuous