Definition of echelon noun from the Oxford Advanced American Dictionary

     

    echelon

     noun
    noun
    NAmE//ˈɛʃəˌlɑn//
     
     
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  1. 1 [usually plural] a rank or position of authority in an organization or a society the lower/upper/top/higher echelons of the Pentagon
  2. 2an arrangement of soldiers, planes, etc. in which each one is behind and to the side of the one in front
See the Oxford Advanced Learner's Dictionary entry: echelon