Definition of spleen noun from the Oxford Advanced American Dictionary

     

    spleen

     noun
    noun
    NAmE//splin//
     
     
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  1. 1[countable] a small organ near the stomach that controls the quality of the blood cells a ruptured spleen
  2. 2[uncountable] (literary) anger He vented his spleen (= shouted in an angry way) on the assembled crowd. see also splenetic
See the Oxford Advanced Learner's Dictionary entry: spleen