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



    BrE BrE//ˈaʊtə(r)//
    ; NAmE NAmE//ˈaʊtər//
    [only before noun]
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  1. 1  on the outside of something synonym external the outer layers of the skin
  2. 2  furthest from the inside or centre of something I walked along the outer edge of the track. the outer suburbs of the city Outer London/Mongolia (figurative) to explore the outer (= most extreme) limits of human experience
  3. opposite inner
    Word Originlate Middle English: from out + -er, replacing earlier utter in its obsolete sense ‘outer’.
See the Oxford Advanced American Dictionary entry: outer