Lookout
WordNet
noun
(1) The act of looking out
(2) A structure commanding a wide view of its surroundings
(3) An elevated post affording a wide view
(4) A person employed to watch for something to happen
WiktionaryText
Noun
- A vantage point with a view of the surrounding area.
- A person on watch for approaching enemy, police, etc.
- The raid failed when the lookout noticed the enemy group.