(British spelling) One who signals. / (rail transport) synonym of signalman

(American spelling) present participle of signal

(American spelling, usually biochemistry) The sending of a biochemical or other type of signal.

(US, Canada) simple past tense and past participle of signal

plural of signaler

One who signals. / A device that sends a signal.

In a signal manner; conspicuously

The process of signalizing; characterization or differentiation

(transitive, archaic) To distinguish, to make noteworthy. / (transitive, archaic) To display or make known (an attribute, quality, etc.); to call attention to.

the use of signals in communications, especially the sending of signals in telecommunications / (rail transport) the signals and associated equipment required for their operation.