the GNU version of the Collaborative International Dictionary of English
n. One set to watch; a person who keeps guard; a guard; a sentinel.
n. Specifically, one who guards a building, or the streets of a city, by night.
The Century Dictionary and Cyclopedia
n. A person set to keep watch; specifically, a sentinel; a guard; one who guards the streets of a city by night; also, one set to keep guard, as over a building in the night, to protect it from fire or thieves.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a guard who keeps watch
Word Usage
"When a watchman is absent, or remiss, or bribed, the stream is turned out of its course, and every one helps himself or fills his cistern."