A sequence of states representing an encoded message in a communication channel. / Any variation of a quantity or change in an entity over time that conveys information upon detection.

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

present participle of signal

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

plural of signaler

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

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

(American spelling) present participle of signal

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.