hornnoun(ANIMAL)
C1[ C ]
a hard, pointed, often curved part that grows from the head of some animals:
The bull lowered its horns and charged straight at him.
The male deer grows large branching horns called antlers.
[ U ]
the hard substance from which the hard part on the head of some animals is made:
The handle of the knife was made of horn, perhaps elk or deer.
Many traditional medicines call for ivory or rhino horn.
[ C ]
a part on an animal's head that sticks out in a similar way to a horn:
The snail pulls in its horns.
The bird's brow plumes are twice the size of its body, forming willowy horns.