Source : Webster's Revised Unabridged Dictionary (1913)

Repression \Re*pres"sion\ (r?-pr?sh"?n), n. [Cf. F.
   r['e]pression.]
   1. The act of repressing, or state of being repressed; as,
      the repression of evil and evil doers.

   2. That which represses; check; restraint.

Source : WordNet®

repression
     n 1: a state of forcible subjugation; "the long repression of
          Christian sects"
     2: (psychiatry) the classical defense mechanism that protects
        you from impulses or ideas that would cause anxiety by
        preventing them from becoming conscious
     3: the act of repressing; control by holding down; "his goal
        was the repression of insolence"