- 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"
- Sig·nal (sgnl) n. 1. a. An indicator, such as a gesture or colored light, that serves as a means of communication. See Synonyms at gesture. b. A message communicated by such means. 2. Something that incites action: The peace treaty was the signal
- Any nonverbal action or gesture that encodes a message; "signals from the boat suddenly stopped"
- Any incitement to action; "he awaited the signal to start"; "the victory was a signal for wild celebration"
- An electric quantity (voltage or current or field strength) whose modulation represents coded information about the source from which it