Definition of stupendous adjective from the Oxford Advanced American Dictionary

     

    stupendous

     adjective
    adjective
    NAmE//stuˈpɛndəs//
     
     
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  1. 1extremely large or impressive, especially greater or better than you expect synonym staggering
  2. 2 stupendous achievements stupendous costs
stupendously
 
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adverb
See the Oxford Advanced Learner's Dictionary entry: stupendous