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Meaning of SIGNAL

Pronunciation:  'signl

WordNet Dictionary
  1. [n]  any communication that encodes a message; "signals from the boat suddenly stopped"
  2. [n]  any incitement to action; "he awaited the signal to start"; "the victory was a signal for wild celebration"
  3. [n]  an electric quantity (voltage or current or field strength) whose modulation represents coded information about the source from which it comes
  4. [adj]  notably out of the ordinary; "the year saw one signal triumph for the Labour party"
  5. [v]  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"
  6. [v]  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"

SIGNAL is a 6 letter word that starts with S.


 Synonyms: bespeak, betoken, impressive, indicate, point, sign, sign, signaling, signalise, signalize
 See Also: alarm, alarum, alert, all clear, animal communication, augur, auspicate, beam, bode, bugle call, communicate, communication, curfew, distress call, distress signal, dog-ear, drumbeat, electrical energy, electricity, electronic signal, flag, forecast, foreshadow, foretell, heliograph, high sign, incitation, incitement, indicator, input, input signal, intercommunicate, mark, number, omen, output, output signal, phone number, portend, predict, prefigure, presage, prognosticate, provocation, radio beacon, radio beam, radiotelegraphic signal, recording, retreat, semaphore, start, starting signal, storm signal, symbol, telegraphic signal, telephone number, tell, ticktack, time signal, visual signal, warning signal, whistle, whistle, whistling, wigwag



Webster's 1913 Dictionary
  1. \Sig"nal\, n. [F., fr. LL. signale, fr. L. signum. See
    {Sign}, n.]
    1. 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.
             All obeyed The wonted signal and superior voice Of
             this great potentate.                 --Milton.
    2. A token; an indication; a foreshadowing; a sign.
             The weary sun . . . Gives signal of a goodly day
             to-morrow.                            --Shak.
             There was not the least signal of the calamity to be
             seen.                                 --De Foc.
  2. \Sig"nal\, a. [From signal, n.: cf. F. signal['e].]
    1. Noticeable; distinguished from what is ordinary; eminent;
       remarkable; memorable; as, a signal exploit; a signal
       service; a signal act of benevolence.
             As signal now in low, dejected state As erst in
             highest, behold him where he lies.    --Milton.
    2. Of or pertaining to signals, or the use of signals in
       conveying information; as, a signal flag or officer.
    {The signal service}, a bureau of the government (in the
       United States connected with the War Department) organized
       to collect from the whole country simultaneous raports of
       local meteorological conditions, upon comparison of which
       at the central office, predictions concerning the weather
       are telegraphed to various sections, where they are made
       known by signals publicly displayed.
    {Signal station}, the place where a signal is displayed;
       specifically, an observation office of the signal service.
    Syn: Eminent; remarkable; memorable; extraordinary; notable;
  3. \Sig"nal\, v. t. [imp. & p. p. {Signaled or Signalled};
    p. pr. & vb. n. {Signaling} or {Signalling}.]
    1. To communicate by signals; as, to signal orders.
    2. To notify by a signals; to make a signal or signals to;
       as, to signal a fleet to anchor. --M. Arnold.
Computing Dictionary
  1. A synchronous language by Le Guernic et al of inria.

    ["SIGNAL - A Data Flow-Oriented Language for Signal Processing," P. le Guernic, IEEE Trans Acoustics Speech & Signal Proc, ASSP-34(2):362-1986-04-374].

  2. A predefined message sent between two unix processes or from the kernel to a process. Signals communicate the occurrence of unexpected external events such as the forced termination of a process by the user. Each signal has a unique number associated with it and each process has a signal handler set for each signal. Signals can be sent using the kill system call.