Webster's English Dictionary

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repression

re.pres.sion \ri-'presh-*n\ n 1a: the act of repressing : the state of 
   being repressed  1b: an instance of repressing  2a: a process by which 
   unacceptable desires or impulses are excluded from c onsciousness and left 
   to operate in the unconscious 2b: an item so excluded