plural of signal fire

A fire lit to convey a message or serve as a beacon, by either light or smoke.

(rail transport, UK) A small explosive charge (detonator) which can be placed on a railway line in fog, to be detonated by a train passing over it as a warning signal to the driver.

simple past tense and past participle of virtue signal

(intransitive) To practice virtue signalling.

Alternative form of virtue signalling

(computing) A signal that oscillates between a high and a low state and is used like a metronome to coordinate actions of digital circuits.

(rail transport) A post on which one or more railway signals are mounted.

plural of signal post

(idiomatic, informal) A thing which serves to attract or summon something.