lookout Definition

lookout
noun

1. A careful watch.
2. A place from which such a watch can be kept.

Thesaurus: observation tower, lighthouse, observatory, post, watchtower.
3. Someone who has to keep watch, eg on board ship.
4. colloq
A personal concern or problem.
Example: That's your lookout

Idiom: be on the lookout for someone or something

To be watching for them or it.
Example: She was always on the lookout for a bargain