Any similar real or imaginary growth or projection such as the elongated tusk of a narwhal, the eyestalk of a snail, the pointed growth on the nose of a rhinoceros, or the hornlike projection on the head of a demon or similar.
“I gave Kamrasi a bottle of quinine and asked him, in return, for a horn containing all the powders necessary to give me the gift of tongues.”
“One of the most wanted objects up to the 1660s was the so-called horn of a unicorn.”
“She was like a kid, bouncing up and down in the leather seats, pressing every button, asking a million questions, honking the horn of cars on display.”