/ ˈlʊkaʊt; NAmE / noun
1.
a place for watching from, especially for danger or an enemy coming towards you :
a lookout point / tower
2.
a person who has the responsibility of watching for sth, especially danger, etc. :
One of the men stood at the door to act as a lookout.
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IDIOMS
- be sb's lookout
- be on the lookout (for sb/sth) | keep a lookout (for sb/sth)