Definition of selfsame adjective from the Oxford Advanced American Dictionary

     

    selfsame

     adjective
    adjective
    NAmE//ˈsɛlfseɪm//
     
    [only before noun]the, this, etc. selfsame…
     
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  1. 1used to emphasize that two people or things are the same synonym identical
  2. 2 Jane had been wondering that selfsame thing.
See the Oxford Advanced Learner's Dictionary entry: selfsame