(railways) One of the danger signals or safety signals which guide the movement of trains in a block system, often coupled with a switch so that opening or closing the switch also operates the signal.

(chiefly US, automotive) each of the flashing lights on each side of a vehicle which indicate a turn is being made to left or right, or a lane change etc.

Alternative form of virtue signalling

plural of turn signal

(neologism) Somebody who engages in virtue signalling.

plural of false signal

plural of busy signal

plural of gang signal

plural of mixed signal

plural of signal indication