Definition of ostentatious adjective from the Oxford Advanced Learner's Dictionary

     

    ostentatious

     adjective
    adjective
    BrE BrE//ˌɒstenˈteɪʃəs//
     
    ; NAmE NAmE//ˌɑːstenˈteɪʃəs//
     
     
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  1. 1(disapproving) expensive or noticeable in a way that is intended to impress people synonym showy ostentatious gold jewellery
  2. 2(disapproving) behaving in a way that is meant to impress people by showing how rich, important, etc. you are
  3. 3(of an action) done in a very obvious way so that people will notice it He gave an ostentatious yawn.
See the Oxford Advanced American Dictionary entry: ostentatious