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Definition of 'organ'


  1. a fully differentiated structural and functional unit in an animal that is specialized for some particular function
  2. a government agency or instrument devoted to the performance of some specific function; "The Census Bureau is an organ of the Commerce Department"
  3. (music) an electronic simulation of a pipe organ
       Synonyms: electric organ electronic organ Hammond organ
  4. a periodical that is published by a special interest group; "the organ of the communist party"
  5. wind instrument whose sound is produced by means of pipes arranged in sets supplied with air from a bellows and controlled from a large complex musical keyboard
       Synonyms: pipe organ
  6. a free-reed instrument in which air is forced through the reeds by bellows
       Synonyms: harmonium reed organ

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