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"
synonyms: gesture, sign, wave, gesticulation, cue, indication, warning, motion
"a signal to stop"
2.
an electrical impulse or radio wave transmitted or received.
"equipment for receiving TV signals"
verb
1.
transmit information or instructions by means of a gesture, action, or sound.
"hold your fire until I signal"
