ˈ ̷ ̷| ̷ ̷ ̷ ̷ adjective
Etymology: bull + headed
1. : having a massive head suggesting that of a bull
2. : stupidly stubborn : headstrong , obstinate
3.
a. : having a bullhead
b. of railway rails : being double-headed with one bulbous end larger than the other, the small end being designed to fit in a chair
Synonyms: see obstinate