Definition of mound noun from the Oxford Advanced American Dictionary

     

    mound

     noun
    noun
    NAmE//maʊnd//
     
     
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  1. 1 a large pile of earth or stones; a small hill an ancient burial mound The fort was built on top of a natural grassy mound.
  2. 2a pile synonym heap a small mound of rice/sand
  3. 3 mound of something (informal) a large amount of something synonym heap I have a mound of paperwork to do.
  4. 4(in baseball) the small hill where the player who throws the ball (called thepitcher) stands
See the Oxford Advanced Learner's Dictionary entry: mound