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Added 5 October 2026

signal

/ˈsɪɡnəl/ noun

Latin root: signāle Wiktionary

noun Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about signal at Wordnik → Where our words come from →

A sequence of states representing an encoded message in a communication channel.
Any variation of a quantity or change in an entity over time that conveys information upon detection.
A sign made to give notice of some occurrence, command, or danger, or to indicate the start of a concerted action.

verb

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

adjective

Standing above others in rank, importance, or achievement.
a signal exploit; a signal success; a signal act of benevolence

Origin

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.

From Wiktionary, via Kaikki.org (CC BY-SA)

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