The Collaborative International Dictionary
Watchman \Watch"man\, n.; pl. Watchmen.
One set to watch; a person who keeps guard; a guard; a sentinel.
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Specifically, one who guards a building, or the streets of a city, by night.
Watchman beetle (Zo["o]l.), the European dor.
Watchman's clock, a watchman's detector in which the apparatus for recording the times of visiting several stations is contained within a single clock.
Watchman's detector, or Watchman's time detector, an apparatus for recording the time when a watchman visits a station on his rounds.
Watchman's rattle, an instrument having at the end of a handle a revolving arm, which, by the action of a strong spring upon cogs, produces, when in motion, a loud, harsh, rattling sound.
Usage examples of "watchman's clock".
Picturing Krendler now in her mind, she saw him wearing Navy oxfords on his feet like the mayor, her father's boss, coming to collect the watchman's clock.