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

     

    mountainous

     adjective
    adjective
    BrE BrE//ˈmaʊntənəs//
     
    ; NAmE NAmE//ˈmaʊntənəs//
     
    Mountains and valleys, Describing geographic regions
     
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  1. 1having many mountains a mountainous region/terrain Wordfinderbarren, fertile, landscape, lush, mountainous, rolling, rugged, undulate, volcanic, wooded See related entries: Mountains and valleys, Describing geographic regions
  2. 2very large in size or amount; like a mountain synonym huge mountainous waves
See the Oxford Advanced American Dictionary entry: mountainous