light signal
Flashing traffic indicator
A light signal is a message or communication conveyed through light—a flash, beam, or pattern used to transmit information.
Ships use light signals to communicate at sea, lighthouses signal warnings to vessels, and cars have turn signals.
Traffic lights are light signals governing vehicle flow.
The aircraft responded to the light signal from the control tower.
- beaconGuiding light source
- flashBrief burst of light
- flareSudden bright burst
- blinkRapid lid movement
- strobeRapidly pulsing light
lantern · semaphore · headlight · indicator · pulse · glow · warning · traffic · lighthouse · hazard · blinker · torch · lamp · beam · illumination · flicker · emergency · reflector
- visual signalsflag code, heliograph, wigwag
- signalswaved, nodded, gestured, blinked, flashed
- nonverbal signalsgesture, gestures, nod, wink, smile
- signal lightsbeacon, emergency beacon, warning beacon, locator beacon, strobe
- nautical signalsgolf flag, semaphore, substitutes, distress flag, warning flag
- game startskickoff, tip-off, tipoff, face-off, puck drop