Definition of lower adjective from the Oxford Advanced American Dictionary

      

    lower1

     adjective
    adjective
    NAmE//ˈloʊər//
     
    see also lower2[only before noun]
     
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  1. 1located below something else, especially something of the same type, or the other of a pair the lower deck of a ship His lower lip trembled.
  2. 2at or near the bottom of something the mountain's lower slopes I have problems with my lower back.
  3. 3(of a place) located toward the coast, on low ground, or toward the south of an area the lower reaches of the Nile opposite upper
See the Oxford Advanced Learner's Dictionary entry: lower