Definition of monotonous adjective from the Oxford Advanced American Dictionary

     

    monotonous

     adjective
    adjective
    NAmE//məˈnɑtn̩əs//
     
     
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  1. 1never changing and therefore boring synonym dull, repetitious
  2. 2 a monotonous voice/diet/routine monotonous work New secretaries came and went with monotonous regularity.
monotonously
 
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adverb As the clock ticked monotonously on the wall Mr. Simons slowly and methodically cut up and ate his food.
See the Oxford Advanced Learner's Dictionary entry: monotonous