Real Dictionary

bonnet
countable noun: The bonnet of a car is the metal cover over the engine at the front.

bonnet in American English
in Scotland, a flat, brimless cap, worn by men and boys
noun: a hat, usually tying under the chin and often framing the face, formerly much worn by women but now worn mostly by children
transitive verb: to put a bonnet on

bonnet in British English
noun: any of various hats worn, esp formerly, by women and girls, usually framing the face and tied with ribbons under the chin