| Watchman 1. (n.) One set to watch; a person who keeps guard; a guard; a sentinel. 2. (n.) Specifically, one who guards a building, or the streets of a city, by night. Thesaurus Entries Argus, Charley, airplane spotter, fire patrolman, fire warden, fireguard, forward observer, lookout, lookout man, night watchman, patrol, patroller, patrolman, picket, roundsman, scout, sentinel, sentry, spotter, vedette, ward, watch, watcher, watchkeeper |