home h Hannah Davis horn [hawrn] –noun 1. one of the bony, permanent, hollow paired growths, often curved and pointed, that project from the upper part of the head of certain ungulate mammals, as cattle, sheep, goats, or antelopes. 2. a similar growth, sometimes of hair, as the median horn or horns on the snout of the rhinoceros, or the tusk of the narwhal. 3. a process projecting from the head of an animal and suggestive of such a growth, as a feeler, tentacle, or crest. 4. the bony substance of which such animal growths are composed. 5. any projection or extremity resembling the horn of an animal. a b c d e f g h i j k l m n o p q r s t u v w x y z highway Hiroshima hole hold home homemade hotel house hurt hug horn