(rail transport) A semaphore railway signal that is pivoted in the centre of its arm.

Alternative form of handsignalman.

plural of signal lad

(rail transport, UK) A young man employed in a signalbox to record the times of trains as they pass through the area served by the signalbox.

A sign which indicates which way to go to a certain place.

A sign that indicates a danger, for example to vehicles on a road or of hazardous chemicals. / (figuratively) An indication that someone or something is in danger or at risk

(medicine) Synonym of fat pad sign / (advertising) An advertising sign with a sail-like form factor; a tall, rectangular sign is attached on one side to a pole.

(medicine) The situation where the usual diamond-shaped "window" of space between the nailbeds when the distal phalanges of corresponding fingers of opposite hands are directly opposed.

A signature within a mathematical scheme for verifying the authenticity of digital messages or documents.

Alternative form of sign one's death warrant