Definition of "lookout" in English

noun

1. A vantage point with a view of the surrounding area.

2. A session of watching for an approaching enemy, police, etc.

   • We kept a lookout all night, but nobody came.

3. A person on watch for approaching enemy, police, danger, etc.

   • The raid failed when the lookout noticed the enemy group.

4. A subject for observation; a prospect or view.

5. One's perspective, outlook; hence, one's responsibility. (used with a possessive pronoun or a noun in a possessive form).

   • Every person's interest is his own lookout.

6. An observation window.

7. (construction) A joist that extends in cantilever out from the exterior wall (or wall plate) of a building, supporting the roof sheathing and providing a nailing surface for the fascia boards.