Definition of signalled in English

Part of speech

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signalled, verb, past participle of signal (infinitive).
signalled, verb, past simple of signal (infinitive).

WordNet

Noun Plural: signals
signal - any nonverbal action or gesture that encodes a message; "signals from the boat suddenly stopped"
		signaling, sign
		communication something that is communicated by or to or between people or groups
		recording the act of making a record (especially an audio record); "she watched the recording from a sound-proof booth"
		phone number, telephone number, number the number is used in calling a particular telephone; "he has an unlisted number"
		starting signal, start a signal to begin (as in a race); "the starting signal was a green light"; "the runners awaited the start"
		storm signal a signal announcing the approach of a storm (particularly a storm of marked violence)
		radio beam, beam a signal transmitted along a narrow path; guides airplane pilots in darkness or bad weather
		ticktack system of signalling by hand signs used by bookmakers at racetracks
		time signal a signal (especially electronic or by radio) indicating the precisely correct time
		dog-ear a corner of a page turned down to mark your place
		animal communication communication between animals (of the same species)
		alarum, warning signal, alert, alarm a warning serves to make you more alert to danger
		distress call, distress signal an internationally recognized signal sent out by a ship or plane indicating that help is needed
		all clear permission to proceed because obstacles have been removed
		bugle call a signal broadcast by the sound of a bugle
		curfew an order that after a specific time certain activities (as being outside on the streets) are prohibited
		retreat the act of withdrawing or going backward (especially to escape something hazardous or unpleasant)
		drumbeat a vehement and vociferous advocacy of a cause; "the warmongers kept up their drumbeat on Iraq"
		radiotelegraphic signal, telegraphic signal a signal transmitted by telegraphy
		whistling, whistle the act of whistling a tune; "his cheerful whistling indicated that he enjoyed his work"
		high sign a silent signal of warning or recognition; "she started to speak but he gave her the high sign"
		symbol something visible that by association or convention represents something else that is invisible; "the eagle is a symbol of the United States"
		visual signal a signal that involves visual communication
		indicator a device for showing the operating condition of some system
		electronic signal a signal generated by electronic means
		radio beacon a radio station that broadcasts a directional signal for navigational purposes
		input signal, input signal going into an electronic system
signal - an electric quantity (voltage or current or field strength) whose modulation represents coded information about the source from which it comes
		electrical energy, electricity keen and shared excitement; "the stage crackled with electricity whenever she was on it"
signal - any incitement to action; "he awaited the signal to start"; "the victory was a signal for wild celebration"
Adjective signal, signaller, signallest
signal - notably out of the ordinary; "the year saw one signal triumph for the Labour party"

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Wiktionary

signal (Noun)
An indication given to another person.
signal (Noun)
An on-off light, semaphore, or other device used to give an indication to another person.
signal (Noun)
Of a radio, TV, telephone, internet, etc An electrical or electromagnetic action, normally a voltage that is a function of time that conveys the information of the radio or TV program or of communication with another party.
signal (Noun)
Useful information.
signal (Noun)
A simple interprocess communication used to notify a process or thread of an occurrence.
signal (Verb)
To indicate.
signal (Adjective)
Standing above others in rank, importance, or achievement.

Webster DictionaryWebster's Unabridged Dictionary 📘

signal (n.)
A sign made for the purpose of giving notice to a person of some occurence, command, or danger; also, a sign, event, or watchword, which has been agreed upon as the occasion of concerted action.
signal (n.)
A token; an indication; a foreshadowing; a sign.
signal (a.)
Noticeable; distinguished from what is ordinary; eminent; remarkable; memorable; as, a signal exploit; a signal service; a signal act of benevolence.
signal (a.)
Of or pertaining to signals, or the use of signals in conveying information; as, a signal flag or officer.
signal (v. t.)
To communicate by signals; as, to signal orders.
signal (v. t.)
To notify by a signals; to make a signal or signals to; as, to signal a fleet to anchor.

OmegaWiki DictionaryOmegaWiki Dictionary Ω

signal
An indication given to another person.
signal
To make a signal to (someone or something).

Chambers DictionaryChamber's 20th Century Dictionary 📕

signal
sig′nal, n. a sign for giving notice, generally at a distance: token: the notice given: any initial impulse.—v.t. and v.i. to make signals to: to convey by signals:—pr.p. sig′nalling; pa.t. and pa.p. sig′nalled.—adj. having a sign: remarkable: notable: eminent.—ns. Sig′nal-book, a book containing a system of signals; Sig′nal-box, -cab′in, &c., a small house in which railway-signals are worked: the alarm-box of a police or fire-alarm system; Sig′nal-code, a code or system of arbitrary signals, esp. at sea, by flags or lights; Sig′nal-fire, a fire used for a signal; Sig′nal-flag, a flag used in signalling, its colour, shape, markings, and combinations indicating various significations; Sig′nal-gun, a gun fired as a signal.—v.t. Sig′nalise, to make signal or eminent: to signal.—ns. Sig′nal-lamp, a lamp by which signals are made by glasses or slides of different colours, &c.; Sig′nalling, the means of transmitting intelligence to a greater or less distance by the agency of sight or hearing.—adv. Sig′nally.—ns. Sig′nalman, one who makes signals and who interprets those made; Sig′nalment, the act of communicating by signals: description by means of marks; Sig′nal-post, a pole on which movable flags, arms, lights, are displayed as signals; Sig′nal-ser′vice, the department in the army occupied with signalling. [Fr.,—L. signalis, signum.]

Military DictionaryMilitary Dictionary and Gazetteer 💥

signal
Any sign made for marching, fighting, etc. Signals are likewise given by the drum, bugle, and trumpet, during the exercise of a battalion. See SIGNAL SERVICE.

Wikipedia

biology
In biology, especially in electrophysiology, a signal or biopotential is an electric quantity (voltage or current or field strength), that is caused by chemical reactions of charged ions. Another use of the term lies in describing the transfer of information between and within cells, as in signal transduction. Biological signals can also be seen as an example of signal (electrical engineering).
electrical engineering
In the fields of communications, signal processing, and in electrical engineering more generally, a signal is any time-varying quantity.

The concept is broad, and hard to define precisely. Definitions specific to subfields are common. For example, in information theory, a "signal" is a codified message, ie, the sequence of states in a communications channel that encodes a message. In a "communications system", a "transmitter" encodes a "message" into a signal, which is carried to a "receiver" by the communications "channel". For example, the words "Mary had a little lamb" might be the message spoken into a telephone. The telephone transmitter converts the sounds into an electrical voltage signal. The signal is transmitted to the receiving telephone by wires; and at the receiver it is reconverted into sounds.

References.

Shannon, C. E., 2005 [1948], "A Mathematical Theory of Communication," (), accessed Dec. 15, 2005. Orig. 1948, "Bell System Technical Journal", vol. 27, pp. 379-423, 623-656.