signal

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signal

  • /ˈsɪɡnəl/

Rhymes with -ɪɡnəl

Where it comes from

From Old French segnal, seignal or Medieval Latin signāle; noun use of the neuter of Late Latin signālis, from Latin signum; verb use from 1805, as a shortened from signalize (1650s). Doublet of signum and sign.

noun signals · signall

  1. A sequence of states representing an encoded message in a communication channel.
  2. Any variation of a quantity or change in an entity over time that conveys information upon detection.
  3. A sign made to give notice of some occurrence, command, or danger, or to indicate the start of a concerted action. All obeyed / The wonted signal and superior voice / Of this great potentate.
  4. An on-off light, semaphore, or other device used to give an indication to another person.
  5. A railway signal.
  6. Internet, TV, usually, of a radio An 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. My mobile phone can't get a signal in the railway station.
  7. An action, change or process done to convey information and thus reduce uncertainty.
  8. A token; an indication; a foreshadowing; a sign. The weary sun […] / Gives signal of a goodly day to-morrow.
  9. Useful information, as opposed to noise.

    Opposite: noise

  10. Unix A simple interprocess communication used to notify a process or thread of an occurrence.
  11. A signalling interaction between cells.

verb signals · signaling · signalling · signaled · signalled

  1. ambitransitive To indicate; to convey or communicate by a signal. I signalled my acquiescence with a nod.
  2. transitive To communicate with (a person or system) by a signal. Seeing the flames, he ran to the control room and signalled headquarters.

adjective signall

  1. not comparable Standing above others in rank, importance, or achievement. a signal exploit; a signal success; a signal act of benevolence

    Similar: eminent, noteworthy, significant, notable

Thesaurus

Closest in meaning: sign, signalize, indicate, betoken, point, bespeak, impressive, semaphore, communications, call, transmission, signboard, message, sig, transponder, marking

Translations

Every language

noun device to give indication

Españolseñal
Portuguêssinal
Françaissignal
DeutschSignal
Italianosegnale
Românăsemnal indicator, semnalizator
Русскийсемафо́р semafór

noun sign made to give notice

Españolseñal
한국어신호 sinho, 시그널 sigeuneol
日本語信号 shingō, 合図 aizu, シグナル shigunaru
中文信號 /信号 xìnhào, 訊號 /讯号 xùnhào
हिन्दीसंकेत saṅket, इशारा iśārā
Kiswahiliishara
Portuguêssinal
Françaissignal
DeutschSignal
Italianosegnale
Ελληνικάσήμα síma
Românăsemnal
Русскийсигна́л signál, знак znak
Tiếng Việttín hiệu
العربيةإِشَارَة ʔišāra
עבריתאוֹת ot, סִיגְנָל signál

noun telecommunication: electromagnetic action that conveys information

Españolseñal
한국어전파 jeonpa
日本語電波 denpa
中文信号 xìnhào
Portuguêssinal, rede
Italianosegnale, campo
Românăsemnal
Русскийсигна́л signál
Tiếng Việttín hiệu

noun action, change or process to convey information

Españolseñal

noun foreshadowing

Portuguêssinal
Русскийзнак znak

noun useful information as opposed to noise

Portuguêssinal
Русскийсигна́л signál

noun computing: simple interprocess communication

Françaissignal
Русскийсигна́л signál

verb to indicate

Españolseñalizar
Françaissignaler
Deutschsignalisieren
Italianosegnalare, indicare
Русскийсигнализи́ровать signalizírovatʹ, просигнализи́ровать prosignalizírovatʹ

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Cite this
MLA

"signal." Wiktionary, via Micwyn, micwyn.com/word/signal. Accessed 6 Nov. 2026.

APA

signal. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/signal

Chicago

"signal." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/signal.

BibTeX
@misc{signal_2026,
  title = {signal},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/signal},
  urldate = {2026-11-06}
}