SIGNAL Definition & Meaning | Dictionary.com
https://www.dictionary.com/browse/signal
Weban act, event, or the like that causes or incites some action: The unjust execution was the signal for revolt. a token; indication. Synonyms: sign. Electronics. an electrical quantity or effect, as current, voltage, or electromagnetic waves, that can be varied in such a way as to convey information.
DA: 29 PA: 97 MOZ Rank: 86