signal

v. communicate through the use of signals; indicate, gesture, beckon

n. gesture which communicates something; cue, sign which initiates a certain action; conveying of information through the modulation of an electronic wave (Electronics); current or wave that is transmitted or received (Electronics)

adj. out of the ordinary, notable

Signal, signals, signaling, or signalling may refer to:Scientific conceptsSignal (electrical engineering), a varying quantity that can carry information.Signal processing, the field of techniques used to extract information from signalsCell signaling, in biology, the system of communication that governs basic cellular activities and coordinates cell actionsSignal (biology), an electrochemical communication activity in an organism
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n. signal, sign, mark

n. signal, sign, indication; cue

(v. t.)
To notify by a signals; to make a signal or signals to; as, to signal a fleet to anchor.
  

(v. t.)
To communicate by signals; as, to signal orders.
  

(n.)
A token; an indication; a foreshadowing; a sign.
  

(n.)
A sign made for the purpose of giving notice to a person of some occurence, command, or danger; also, a sign, event, or watchword, which has been agreed upon as the occasion of concerted action.
  

(a.)
Of or pertaining to signals, or the use of signals in conveying information; as, a signal flag or officer.
  

(a.)
Noticeable; distinguished from what is ordinary; eminent; remarkable; memorable; as, a signal exploit; a signal service; a signal act of benevolence.