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SIGNAL
- to notify by means of communication [v SIGNALED or SIGNALLED, SIGNALLING, SIGNALS]
- sign indication
- act, event, or watchword that has been agreed on as the occasion of concerted action
- object used to transmit or convey information beyond the range of human voice
- to notify by a means of communication [v SIGNALED, SIGNALING, SIGNALLED, SIGNALLING, SIGNALS]
- detectable physical quantity or impulse (as a voltage, current, or magnetic field strength) by which messages or information can be transmitted