definition of
watcher

[1] #1 watcher n. [spectator, witness, viewer, looker] a close observer; someone who looks at something (such as an exhibition of some kind); "the spectators applauded the performance"; "television viewers"; "sky watchers discovered a new star". wn

[2] #2 watcher n. [watchman, security guard] a guard who keeps watch. wn

[3] #3 watcher n. a person who keeps a devotional vigil by a sick bed or by a dead body. wn