Looking for the meaning or definition of the word signal? That's all it means.
a gesture or sign used to communicate
signal, signaling, sign(noun)any nonverbal action or gesture that encodes a message
"signals from the boat suddenly stopped"
signal(noun)any incitement to action
"he awaited the signal to start"; "the victory was a signal for wild celebration"
signal(adj)an electric quantity (voltage or current or field strength) whose modulation represents coded information about the source from which it comes
signal(verb)notably out of the ordinary
"the year saw one signal triumph for the Labour party"
sign, signal, signalize, signalise(verb)communicate silently and non-verbally by signals or signs
"He signed his disapproval with a dismissive hand gesture"; "The diner signaled the waiters to bring the menu"
bespeak, betoken, indicate, point, signal(verb)be a signal for or a symptom of
"These symptoms indicate a serious illness"; "Her behavior points to a severe neurosis"; "The economic indicators signal that the euro is undervalued"
standing above others in rank, importance, or achievementthe Louisiana Purchase is cited by many historians as one of the most signal events in American history
to direct or notify by a movement or gesturesignaled the oncoming traffic to stop while the wrecked car was being towed away
an object intended to give public notice or warningstop signs are signals for vehicles to come to a full stop—not suggestions for slowing down, as some drivers seem to think
a movement of the body or limbs that expresses or emphasizes an idea or feelingquietly waiting for the signal to advance
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