Definition of square adverb from the Oxford Advanced American Dictionary

     

    square

     adverb
    adverb
    NAmE//skwɛr//
     
     
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  1. 1(only used after the verb) directly; not at an angle synonym squarely
  2. 2 I looked her square in the face. He hit me square on the jaw.
  3. Idioms
    fair and square
     
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    honestly and according to the rules We won the election fair and square.
See the Oxford Advanced Learner's Dictionary entry: square