- To be available or unused.
- There's some bacon going spare if anyone wants some more.
- (Britain, informal) To become angry, to lose one's temper
- When he found out that someone had broken the window, he went spare.
- (informal) To become frustrated or distressed.
- The poor girl is going spare, stuck in the house all day with the kids like that.
- (archaic) To be unemployed.