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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 certain

1 definition found

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

  certain
      adj 1: definite but not specified or identified; "set aside a
             certain sum each week"; "to a certain degree"; "certain
             breeds do not make good pets"; "certain members have not
             paid their dues"; "a certain popular teacher"; "a certain
             Mrs. Jones"
      2: having or feeling no doubt or uncertainty; confident and
         assured; "felt certain of success"; "was sure (or certain)
         she had seen it"; "was very sure in his beliefs"; "sure of
         her friends" [syn: {certain(p)}, {sure}] [ant: {incertain},
         {uncertain}, {unsure}]
      3: established beyond doubt or question; definitely known; "what
         is certain is that every effect must have a cause"; "it is
         certain that they were on the bus"; "his fate is certain";
         "the date for the invasion is certain" [ant: {uncertain}]
      4: certain to occur; destined or inevitable; "he was certain to
         fail"; "his fate is certain"; "In this life nothing is
         certain but death and taxes"- Benjamin Franklin; "he faced
         certain death"; "sudden but sure regret"; "he is sure to win"
         [syn: {certain}, {sure}] [ant: {uncertain}]
      5: established irrevocably; "his fate is sealed" [syn: {sealed},
         {certain}] [ant: {uncertain}, {unsealed}]
      6: reliable in operation or effect; "a quick and certain
         remedy"; "a sure way to distinguish the two"; "wood dust is a
         sure sign of termites" [syn: {certain}, {sure}]
      7: exercising or taking care great enough to bring assurance;
         "be certain to disconnect the iron when you are through"; "be
         sure to lock the doors" [syn: {certain}, {sure}]

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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