Definition Of signal


a gesture, action, or sound that is used to convey information or instructions, typically by prearrangement between the parties concerned.

the firing of the gun was the signal for a chain of beacons to be lit

an electrical impulse or radio wave transmitted or received.

equipment for receiving TV signals

striking in extent, seriousness, or importance; outstanding.

he attacked the administration for its signal failure of leadership

transmit information or instructions by means of a gesture, action, or sound.

hold your fire until I signal

Example Of signal

  • A signal is then produced indicating that the structure is complete and the scaffolding protein detaches to be used again in making other virus tails.

  • A signal was sounded in Post Offices across the country and customers were asked to join staff in remembering the dead and injured.

  • A drop in the intracellular concentration of glutamine provides a signal for the activation of transcription of nitrogen-regulated genes.

  • About 20 minutes later mission control erupted in cheers, hugs and tears when a signal from the craft indicated it was still functioning.

  • After this fun, a foghorn sounded to signal the beginning of a ‘self-guided’ walking tour.

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