Definition of: hammerhead

(ham′ər·hed′) noun
1. The head of a hammer.
2. A heronlike wading bird (order Ciconiiformes) native to Africa and Madagascar, with a blunt–pointed beak, clove–brown plumage, and a large crest.
3. A voracious shark (family Sphynidae) of warm seas, having a transversely elongated head with the eyes at each end.
4. The hogsucker.
5. An African fruit bat (family Pteropidae) with an elongated snout, related to the flying fox.