a part of a coat, etc. that you can pull up to cover the back and top of your head

a piece of cloth put over somebody’s face and head so that they cannot be recognized or so that they cannot see

The detainees were led away with black hoods over their heads.

a piece of coloured silk or fur worn over an academic gown to show the kind of degree held by the person wearing it

a folding cover over a car, child's buggy, etc.

We drove all the way with the hood down.

the metal part over the front of a vehicle, usually covering the engine

the sound of a bird hitting the hood of the car

a cover placed over a device or machine, for example, to protect it

hoodlum(= a violent criminal, especially one who is part of a gang)

a neighbourhood, especially a person’s own neighbourhood

LEARNit Dictionary