Definition of bonnets:
(n) :
A type of hat, once worn by women or children, held in place by ribbons tied under the chin.
(n) :
A traditional Scottish woollen brimless cap; a bunnet.
(n) :
(by extension) The polishing head of a power buffer, often made of wool.
(n) :
(Australia, British, New Zealand, South Africa, Commonwealth, automotive) The hinged cover over the engine of a motor car, also known as a hood in chiefly Canada and the US.
(n) :
(nautical) A length of canvas attached to a fore-and-aft sail to increase the pulling power.
(n) :
The second stomach of a ruminant.