plain - definition and synonyms

 
 
noun 

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/pleɪn/
singularplain
pluralplains
  1. 1

    plain

    or

    plains

    [countable] a large flat area of land

    the vast plains in the central states of the US

    the Serengeti Plains in East Africa

  2. 2
    [uncountable] British the ordinary basic stitch in knitting