Definitions

1. noun

any of various catadromous fish of the genus Amiurus, having a broad, flat head, found in North American rivers and streams. Also, a person who is aggressive or quarrelsome.

“The fisherman caught a large bullhead in the river.”

2. noun

a type of armor, especially a helmet or a piece of armor for the head, shaped like a bull’s head.

“The medieval knight wore a bullhead helmet into battle.”