(1):

(n.) A two-horned animal of some unknown kind, so called in the Authorized Version of the Scriptures.

(2):

(n.) The kamichi; - called also unicorn bird.

(3):

(n.) A howitzer.

(4):

(n.) A fabulous animal with one horn; the monoceros; - often represented in heraldry as a supporter.

(5):

(n.) Any large beetle having a hornlike prominence on the head or prothorax.

(6):

(n.) The larva of a unicorn moth.