Definitions For Signal

noun

• Any nonverbal action or gesture that encodes a message
• Any incitement to action
• An electric quantity (voltage or current or field strength) whose modulation represents coded information about the source from which it comes
• An event or act which shows that something exists or that gives information about something
• Something (such as a sound, a movement of part of the body, or an object) that gives information about something or that tells someone to do something
• A piece of equipment with colored lights that is used on railways and roads to tell people when to go, to slow down, or to stop

verb

• Be a signal for or a symptom of
• Communicate silently and non-verbally by signals or signs
• To be a sign of (something) : to show the existence of (something)
• To make a sound or motion that tells someone something

adjective

• Notably out of the ordinary