1.Definition: a person employed to keep watch for some anticipated event

Related Noun(s):lookout man, picket, scout, sentinel, sentry, spotter, watch

Category: People

2.Definition: a structure commanding a wide view of its surroundings

Related Noun(s):observatory

Category: Objects

3.Definition: an elevated post affording a wide view

Related Noun(s):observation post

Category: Places

4.Definition: the act of looking out

Related Noun(s):outlook

Category: General