Definition of mousy adjective from the Oxford Advanced American Dictionary

     

    mousy

     adjective
    (also mousey)adjective
    NAmE//ˈmaʊsi//
     
     
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  1. 1(of hair) of a dull brown color
  2. 2(usually disapproving) (of people) shy and quiet; without a strong personality He was accompanied by his mousy little wife.
See the Oxford Advanced Learner's Dictionary entry: mousy