0 part of a piece of clothing that can be pulled up to cover the top and back of the head: --
The coat has a detachable hood.
2 a poor neighbourhood: --
When he started he was just a poor boy from the hood - now he's a multimillionaire.
3 used to form nouns describing the state of being a particular thing: --
nationhood
4 a part of a coat or jacket that can be used to cover the head: --
The raincoat comes with a detachable hood.
5 the metal cover over the engine of a car --