Noun
-
an electric quantity (voltage or current or field strength) whose modulation represents coded information about the source from which it comes
-
any incitement to action
"he awaited the signal to start"
"the victory was a signal for wild celebration"
-
any nonverbal action or gesture that encodes a message
"signals from the boat suddenly stopped"
Verb
-
be a signal for or a symptom of
"These symptoms indicate a serious illness"
"Her behavior points to a severe neurosis"
"The economic indicators signal that the euro is undervalued"
-
communicate silently and non-verbally by signals or signs
"He signed his disapproval with a dismissive hand gesture"
"The diner signaled the waiters to bring the menu"
Adjective
-
notably out of the ordinary
"the year saw one signal triumph for the Labour party"