hood [hud] n
[Sense: 1-4; Origin: Old English hod]
[Sense: 5; Date: 1900-2000; Origin: neighbourhood]
[Sense: 6; Date: 1800-1900; Origin: hoodlum]
a) a part of a coat, jacket etc that you can pull up to cover your head
Why don't you put your hood up if you're cold?
b) a cloth bag that goes over someone's face and head so that they cannot be recognized or cannot see
He was abducted by four men wearing hoods.
2.) AmE the metal covering over the engine on a car
British Equivalent: bonnetunder the hood
Check under the hood and see what that noise is.
3.) a cover fitted above a ↑cooker to remove the smell of cooking
→↑extractor (fan)
4.) BrE a folding cover on a car or ↑pram, which gives protection from the rain
5.) also 'hood
AmE informal a ↑neighbourhood
6.) AmE informal a ↑hoodlum

Dictionary of contemporary English. 2013.