sig·nal /ˈsɪgnḷ/
 信號,暗號,近因,導火線,動機(vt.)向…作信號,標誌


 signal
 無信號


 signal
 信號重成形


 signal
 信號


 signal
 信號轉換


 signal
 信號


 Sig·nal, v. t. [imp. & p. p. Signaled ∨ 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.

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 Sig·nal 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; anything taken as evidence of some process.
 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.


 Sig·nal, a.
 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; conspicuous.


 signal
      adj : notably out of the ordinary; "the year saw one signal
            triumph for the Labour party"
      n 1: any communication that encodes a message; "signals from the
           boat suddenly stopped" [syn: signaling, sign]
      2: any incitement to action; "he awaited the signal to start";
         "the victory was a signal for wild celebration"
      3: an electric quantity (voltage or current or field strength)
         whose modulation represents coded information about the
         source from which it comes
      v 1: 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" [syn: sign, signalize, signalise]
      2: 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" [syn: bespeak, betoken, indicate, point]
      [also: signalling, signalled]