signal
Abbr. sig.
1.
2.
3.
4. The sound, image, or message transmitted or received in telegraphy, telephony, radio, television, or radar.
adjective
Notably out of the ordinary: a signal feat. See synonyms at noticeable.
verb
signaled
To make a signal or signals.
[Middle English, from Old French, from Medieval Latin signāle, from neuter of Late Latin signālis, of a sign, from Latin signum, sign. See
sig