1.Definition: a period of time (4 or 2 hours) during which some of a ship's crew are on duty

Category: General

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

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

Category: People

3.Definition: a purposeful surveillance to guard or observe

Related Noun(s):vigil

Category: General

4.Definition: a small portable timepiece

Related Noun(s):ticker

Category: Objects

5.Definition: the period during which someone (especially a guard) is on duty

Category: General

6.Definition: the rite of staying awake for devotional purposes (especially on the eve of a religious festival)

Related Noun(s):vigil

Category: General