— signaler; esp. Brit. signaller , n.
/sig"nl/ , n., adj., v., signaled, signaling or ( esp. Brit. ) signalled, signalling .
1. anything that serves to indicate, warn, direct, command, or the like, as a light, a gesture, an act, etc.: a traffic signal; a signal to leave.
2. anything agreed upon or understood as the occasion for concerted action.
3. an act, event, or the like that causes or incites some action: The unjust execution was the signal for revolt.
4. a token; indication.
5. Electronics. an electrical quantity or effect, as current, voltage, or electromagnetic waves, that can be varied in such a way as to convey information.
6. Cards. a play that reveals to one's partner a wish that he or she continue or discontinue the suit led.
7. serving as a signal; used in signaling: a signal flag.
8. unusual; notable; outstanding: a signal exploit.
9. to make a signal to.
10. to communicate or make known by a signal.
11. to make communication by a signal or signals.
[ 1350-1400; ME (n.) signale, LL, n. use of neut. of signalis of a sign. See SIGN, -AL 2 , -AL 1 ]
Syn. 1, 4. sign. 8. unique, exceptional, remarkable, striking.