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a. An indicator, such as a gesture or colored light, that serves as a means of communication. See Synonyms at gesture.
b. A message communicated by such means.
2. Something that incites action: The peace treaty was the signal for celebration.
3. Biology A physical entity, such as a chemical or an electromagnetic wave, that activates a cell receptor and elicits a specific response.
a. Electronics An impulse or fluctuating quantity, as of electrical voltage or light intensity, whose variations represent coded information.
b. Computers A sequence of digital values whose variations represent coded information.
5. The sound, image, or message transmitted or received by means of telecommunications.
Notably out of the ordinary: a signal feat; a signal event.
v. sig·naled, sig·nal·ing, sig·nals or sig·nalled or sig·nal·ling
1. To make a signal to: I signaled the driver to proceed.
2. To relate or make known by signals: They have signaled their willingness to negotiate.
3. To cause an effect in (a cell) by the activation of a receptor, as by a neurotransmitter or hormone.
To make a signal or signals.

[Middle English, from Old French, from Medieval Latin signāle, from neuter of Late Latin signālis, of a sign, from Latin signum, sign; see sign.]

sig′nal·er, sig′nal·ler n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.signaller - someone who communicates by signalssignaller - someone who communicates by signals
communicator - a person who communicates with others
signalman - a railroad employee in charge of signals and point in a railroad yard
bell ringer, ringer, toller - a person who rings church bells (as for summoning the congregation)
whistler - someone who makes a loud high sound
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


, (US) signaler
n (Mil) → Fernmelder(in) m(f), → Funker(in) m(f)
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007
References in classic literature ?
Signallers with heliographs were pushing forward upon them from all sides.
At his side on the Galpharm pitch was Signaller Myzak, a former Colne Valley High School pupil who joined the Army three years ago.
Signaller Anson's parents Paul and Susan can expect to see their son being photographed by hundreds of tourists drawn to the palace and the iconic guards.
There should have been a formally appointed signaller who should have checked the area to ensure there was no one that could be hurt."
They began communicating when Ms Batstone was a Wren signaller based at the Ganavan War Signal Station, near Oban, on Scotland's west coast, 57 years ago.
An old soldier of the Cameronians who was now a Brigade signaller, an old soldier of the Royal Welch who was now a Brigade runner, and the corporal, were the only ones I knew of our station.
Signaller Grout was on a brief visit to see mum Maureen and stepdad Ian when he was assaulted in Eston, Teesside, on Tuesday evening.
Signaller Singh, who is serving with 21 Signal Regiment, became the first Sikh to be given the honour of guarding the Queen.
Leeds soldier Signaller Wayne Bland, 21, died from his injuries after a suicide bomber rammed a car into his convoy in Kabul.
Police said signallers had not received a telephone call to tell them the van was planning to cross the Pools Crossing.
'He may have been distracted by the message which was given to him by the signaller at London Bridge which did not require him to take any action.'
Signaller Paul William Didsbury, 18, of the Royal Signals, is understood to have discharged his own weapon in an accident at the Basra airport base, close to the southern Iraqi city.