Flexion \Flex"ion\, n. [L. flexio: cf. F. flexion.]
   1. The act of flexing or bending; a turning.
      
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   2. A bending; a part bent; a fold. --Bacon.
      
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   3. (Gram.) Syntactical change of form of words, as by
      declension or conjugation; inflection.
      
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            Express the syntactical relations by flexion. --Sir
                                                  W. Hamilton.
      
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   4. (Physiol.) The bending of a limb or joint; that motion of
      a joint which gives the distal member a continually
      decreasing angle with the axis of the proximal part; --
      distinguished from extension.
      
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flexion
     n 1: the state of being flexed (as of a joint) [syn: {flexure}, {flection}]
     2: deviation from a straight or normal course [syn: {inflection},
         {flection}]
     3: act of bending a joint; especially a joint between the bones
        of a limb so that the angle between them is decreased
        [syn: {flexure}] [ant: {extension}]