signal

adjective

  1. 1

    notably out of the ordinary

    the year saw one signal triumph for the Labour party

noun

  1. 1

    any nonverbal action or gesture that encodes a message

    signals from the boat suddenly stopped

  2. 2

    any incitement to action

    he awaited the signal to start

    the victory was a signal for wild celebration

  3. 3

    an electric quantity (voltage or current or field strength) whose modulation represents coded information about the source from which it comes

verb

  1. 1

    be a signal for or a symptom of

    These symptoms indicate a serious illness

    Her behavior points to a severe neurosis

  2. 2

    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

Synonyms

Also useful for “signal”:Unscrambler