Hardhead

Origin

hard + head

Full definition of hardhead

Noun

1. One who is practical or hardheaded.
2. A brown diving duck, Aythya australis, native to Australia.
3. Any of various freshwater cyprinid fishes of the genus , or of saltwater sciaenid (Sciaenidae) fishes.
4. Any of several weeds in or formerly classified in the genus Centaurea, particularly Russian knapweed ().
5. (metallurgy) Residual ore that failed to melt during a smelting process.
6. (obsolete) Clash or collision of heads in contest.