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Valid in these dictionaries

TWL/NWL (Scrabble US/CA/TH)
SOWPODS/CSW (Scrabble UK / ALL)
ENABLE (Words with Friends)

Meaning of signal

1 definition found

From WordNet (r) 3.0 (2006) [wn]:

  signal
      adj 1: notably out of the ordinary; "the year saw one signal
             triumph for the Labour party"
      n 1: any nonverbal action or gesture that encodes a message;
           "signals from the boat suddenly stopped" [syn: {signal},
           {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}, {signal}, {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}, {signal}]

Source : WordNet ® Princeton University. 2010.

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OCTWL / TWL : The official dictionary for scrabble game in United States, Canada and Thailand.
SOWPODS / CSW : UK and the rest of the world uses this dictionary for various word games including scrabble.
ENABLE - This is the default dictionary for Words with Friends.

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