|1.||[ noun ] any communication that encodes a message|
"signals from the boat suddenly stopped"
|Related terms:||communication symbol recording indication phone_number radio_beam input_signal indicator output_signal storm_signal dog-ear curfew whistle visual_signal time_signal retreat drumbeat telegraphic_signal animal_communication high_sign electronic_signal distress_signal alarm all_clear radio_beacon starting_signal ticktack bugle_call bespeak signalize sign bless signalize|
|2.||[ verb ] communicate silently and non-verbally by signals or signs|
|Synonyms:||sign signalise signalize|
"He signed his disapproval with a dismissive hand gesture" "The diner signaled the waiters to bring the menu"
|Related terms:||communicate flag heliograph wigwag whistle semaphore signaler signer sign_language|
|3.||[ verb ] be a signal for or a symptom of|
|Synonyms:||indicate point bespeak betoken|
"These symptoms indicate a serious illness" "Her behavior points to a severe neurosis" "The economic indicators signal that the euro is undervalued"
|Related terms:||tell mark bode indication indicator|
|4.||[ noun ] any incitement to action|
"he awaited the signal to start" "the victory was a signal for wild celebration"
|5.||[ noun ] (physics,electricity) an electric quantity (voltage or current or field strength) whose modulation represents coded information about the source from which it comes|
|6.||[ adjective ] notably out of the ordinary|
"the year saw one signal triumph for the Labour party"