the GNU version of the Collaborative International Dictionary of English
n. One who watches; one who sits up or continues; a diligent observer; specifically, one who attends upon the sick during the night.
The Century Dictionary and Cyclopedia
n. One who or that which watches.
n. One who keeps awake for the purpose of guarding or attending upon something or some one; a nurse, watch man, sentry, or the like.
n. One who observes: as, a watcher of the time.
n. A spy; one sent to watch an enemy.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a close observer; someone who looks at something (such as an exhibition of some kind)
n. a guard who keeps watch
n. a person who keeps a devotional vigil by a sick bed or by a dead body
Word Usage
"For every one of us who says actress or hostess or priestess, there is a word watcher, ready with Wite-Out and caret, who believes that, be they male or female, the correct words are actor, host, and priest."