Wiktionary
n. (context aviation chiefly US English) a rotating location light installed at an airport, allowing the type of airport to be determined by the color and speed of the rotation.
Usage examples of "rotating beacon".
Mcclellan was dead ahead, its rotating beacon and runway lights plainly visible.
They were soon in such dense vapor that their forward position light bathed the outside world in a ghostly white glow, while the rotating beacon blinked dazzling green across it like disrupter fire.
And when the CAT aircraft reached the area, they spotted a rotating beacon.
The rotating beacon of a county sheriffs car bounced red and blue light off the front of the building.
The rotating beacon at the airport flashed white light at regular intervals.
The Metro patrolcar appeared out of nowhere, its siren-bullhorn screaming in protest, its rotating beacon glittering, signaling for him to pull over.