Bonnet

a hat, usually tying under the chin and often framing the face, formerly much worn by women but now worn mostly by children.
Informal. any hat worn by women.
Chiefly Scot. a man’s or boy’s cap.
a bonnetlike headdress:
an Indian war bonnet.
any of various hoods, covers, or protective devices.
a cowl, hood, or wind cap for a fireplace or chimney, to stabilize the draft.
the part of a valve casing through which the stem passes and that forms a guide and seal for the stem.
a chamber at the top of a hot-air furnace from which the leaders emerge.
Chiefly British. an automobile hood.
Nautical. a supplementary piece of canvas laced to the foot of a fore-and-aft sail, especially a jib, in light winds.
to put a bonnet on.
Georges
[zhawrzh] /ʒɔrʒ/ (Show IPA), 1889–1973, French statesman.
Contemporary Examples

Virgin Heir Sam Branson’s Drug War Tony Doukopil December 6, 2012
8 Great Books About Books: ‘Phantoms On the Bookshelves’ & More Michele Filgate July 18, 2012
8 Great Books About Books: ‘Phantoms On the Bookshelves’ & More Michele Filgate July 18, 2012
Summer’s Last Beach Read Michael Korda August 26, 2009
Read ‘The King in Yellow,’ the ‘True Detective’ Reference That’s the Key to the Show Robert W. Chambers February 19, 2014

Historical Examples

The Fallen Leaves Wilkie Collins
Ester Ried Yet Speaking Isabella Alden
The Nursery, March 1881, Vol. XXIX Various
Quaint Courtships Various
Dixie Martin Grace May North

noun
any of various hats worn, esp formerly, by women and girls, usually framing the face and tied with ribbons under the chin
Also called (in Scotland) bunnet (ˈbʌnɪt)

a soft cloth cap
formerly, a flat brimless cap worn by men

the hinged metal part of a motor vehicle body that provides access to the engine, or to the luggage space in a rear-engined vehicle
a cowl on a chimney
(nautical) a piece of sail laced to the foot of a foresail to give it greater area in light winds
(in the US and Canada) a headdress of feathers worn by some tribes of American Indians, esp formerly as a sign of war
n.
Bonnet
(bô-ně’)
Swiss naturalist who discovered parthenogenesis when he observed that aphid eggs could develop without fertilization. Bonnet was also one of the first scientists to study photosynthesis.

see: bee in one’s bonnet