Definitions from Wiktionary ( )

▸ noun:  A type of hat, once worn by women or children, held in place by ribbons tied under the chin.
▸ noun:  A traditional Scottish woollen brimless cap; a bunnet.
▸ noun:  (by extension) The polishing head of a power buffer, often made of wool.
▸ noun:  (Australia, British, New Zealand, South Africa, Commonwealth, automotive) The hinged cover over the engine of a motor car; a hood.
▸ noun:  (nautical) A length of canvas attached to a fore-and-aft sail to increase the pulling power.
▸ noun:  (obsolete, slang) An accomplice of a gambler, auctioneer, etc., who entices others to bet or to bid.
▸ noun:  The second stomach of a ruminant.
▸ noun:  (historical) A ducat, an old Scottish coin worth 40 shillings.
▸ noun:  Anything resembling a bonnet (hat) in shape or use.
▸ noun:  A small defence work at a salient angle; or a part of a parapet elevated to screen the other part from enfilade fire.
▸ noun:  A metallic canopy, or projection, over an opening, as a fireplace, or a cowl or hood to increase the draught of a chimney, etc.
▸ noun:  A frame of wire netting over a locomotive chimney, to prevent escape of sparks.
▸ noun:  A roofing over the cage of a mine, to protect its occupants from objects falling down the shaft.
▸ noun:  In pumps, a metal covering for the openings in the valve chambers.
▸ noun:  (mycology) A mushroom of the genus Mycena.
▸ verb:  (transitive) To put a bonnet on.
▸ verb:  (obsolete) To take off the bonnet or cap as a mark of respect; to uncover.
▸ verb:  (dated, transitive) To pull the bonnet or cap down over the eyes of.

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