Etymology 1

Noun

1. A building for soldiers, especially when in garrison. Commonly in the plural, originally meaning temporary huts, but now usually applied to a permanent structure or set of buildings.

   • He lodged in a miserable hut or barrack, composed of dry branches and thatched with straw. - Edward Gibbon.

2. (local, U.S.) A movable roof sliding on four posts, to cover hay, straw, etc.
3. (Ireland,colloquial, usually plural) the police station.

Verb

1. to cheer on a team etc
2. to jeer