hammerhead: Meaning and Definition of

ham•mer•head

1. the part of a hammer designed for striking.
2. a shark of the genus Sphyrna, esp. S. zygaena, having the head expanded laterally so as to resemble a double-headed hammer, sometimes dangerous to swimmers.
3. Also calleda brown heronlike African bird, Scopus umbretta, having the head so crested as to resemble a claw hammer.
4. See
5. blockhead; dunce; lout.