watch - noun

a small portable timepiece

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

a purposeful surveillance to guard or observe

the period during which someone (especially a guard) is on duty

a person employed to keep watch for some anticipated event

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

watch - verb

• look attentively
• follow with the eyes or the mind
• see or watch
• observe with attention
• be vigilant, be on the lookout or be careful
• observe or determine by looking
• find out, learn, or determine with certainty, usually by making an inquiry or other effort

watch - thesaurus

ascertain   catch   check   determine   follow   learn   lookout   observe   picket   scout   see   sentinel   sentry   spotter   ticker   view   vigil