Bonnet has been used as the name for a wide variety of headgear for both sexes—more often female—from the Middle Ages to the present.

What does the slang word bonnet mean?

1a(1) chiefly Scotland : a man's or boy's cap. (2) : a brimless Scottish cap of seamless woolen fabric — compare tam-o'-shanter sense 2. b : a cloth or straw hat tied under the chin and worn by women and children. 2a British : an automobile hood.

Is bonnet a British word?

​Britishthe front part of a car that covers the engine. The American word is hood.