signal

Adjective

• notably out of the ordinary
  • the year saw one signal triumph for the Labour party
    

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
    

Related words

• Synonyms: 
  signaling , sign , bespeak , betoken , indicate , point , signalize , signalise