Definition of "hammerhead" in English

noun

1. The portion of a hammer containing the metal striking face (also including the claw or peen if so equipped).

2. (zoology) Any organism with head shaped like that of a hammer:

3. (slang) A stupid person, a dunce.

4. A turn-around; a parking area constructed in a subdivision for initial access and construction.

5. (biology) A kind of ribozyme; hammerhead ribozyme.