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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 sleeper

1 definition found

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

  sleeper
      n 1: a rester who is sleeping [syn: {sleeper}, {slumberer}]
      2: a spy or saboteur or terrorist planted in an enemy country
         who lives there as a law-abiding citizen until activated by a
         prearranged signal
      3: an unexpected achiever of success; "the winner was a true
         sleeper--no one expected him to get it"
      4: one of the cross braces that support the rails on a railway
         track; "the British call a railroad tie a sleeper" [syn:
         {tie}, {railroad tie}, {crosstie}, {sleeper}]
      5: a passenger car that has berths for sleeping [syn: {sleeping
         car}, {sleeper}, {wagon-lit}]
      6: pajamas with feet; worn by children
      7: a piece of furniture that can be opened up into a bed
      8: tropical fish that resembles a goby and rests quietly on the
         bottom in shallow water [syn: {sleeper}, {sleeper goby}]
      9: an unexpected hit; "that movie was the sleeper of the summer"

Source : WordNet ® Princeton University. 2010.

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OCTWL / TWL : The official dictionary for scrabble game in United States, Canada and Thailand.
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