- anything that serves to indicate, warn, direct, command, or the like, as a light, a gesture, an act, etc.: a traffic signal; a signal to leave.
- anything agreed upon or understood as the occasion for concerted action.
- an act, event, or the like that causes or incites some action: The unjust execution was the signal for revolt.
- a token; indication.
- Electronics. an electrical quantity or effect, as current, voltage, or electromagnetic waves, that can be varied in such a way as to convey information.
- Cards. a play that reveals to one's partner a wish that he or she continue or discontinue the suit led.
- serving as a signal; used in signaling: a signal flag.
- unusual; notable; outstanding: a signal exploit.
- to make a signal to.
- to communicate or make known by a signal.
- to make communication by a signal or signals.
Origin of signal
Synonyms for signalSee more synonyms for on Thesaurus.com
Related Words for signallercaretaker, curator, custodian, detective, guard, keeper, lookout, observer, patrol, picket, ranger, scout, sentinel, sentry, spy, ward, warden, watch, watcher, flagger
Examples from the Web for signaller
Historical Examples of signaller
Am sitting in my dug-out scrawling this by the light of a signaller's lamp.Letters of Lt.-Col. George Brenton Laurie
George Brenton Laurie
We hurried forward, expecting to find that our signaller had been killed.
I tried to locate the signaller on the Headquarters hill, but failed.With the Zionists in Gallipoli
John Henry Patterson
When the dodge had been discovered and the signaller settled the Scottish got their own back.In the Line of Battle
The signaller turned to the senior officer present, "What will I send them, sir?"The Glory of the Trenches
- any sign, gesture, token, etc, that serves to communicate information
- anything that acts as an incitement to actionthe rise in prices was a signal for rebellion
- a variable parameter, such as a current or electromagnetic wave, by which information is conveyed through an electronic circuit, communications system, etc
- the information so conveyed
- (as modifier)signal strength; a signal generator
- distinguished or conspicuous
- used to give or act as a signal
- to communicate (a message, etc) to (a person)
Word Origin for signal
late 14c., "visible sign, indication," from Old French signal, seignal "seal, imprint, sign, mark," from Medieval Latin signale "a signal," from Late Latin signalis (adj.) "used as a signal, pertaining to a sign," from Latin signum "signal, sign" (see sign (n.)). Restricted sense "agreed-upon sign (to commence or desist, etc.) is from 1590s. Meaning "modulation of an electric current" is from 1855.
"remarkable, striking, notable" ("serving as a sign"), 1640s, from French signalé, past participle of signaler "to distinguish, signal" (see signal (n.)).
1805, "to make signals to," from signal (n.). Related: Signaled; signaling. Earlier verb was signalize (1650s).
- A fluctuating quantity or impulse whose variations represent information. The amplitude or frequency of voltage, current, electric field strength, light, and sound can be varied as signals representing information.