What is the meaning of suppression?

noun

• The failure to develop some part or organ.
• The act of withholding or withdrawing some book or writing from publication or circulation.
  • usage: "a suppression of the newspaper"
  • synonyms: curtailment
• Forceful prevention; putting down by power or authority.
  • usage: "the suppression of heresy"; "the quelling of the rebellion"; "the stifling of all dissent"
  • synonyms: crushing, quelling, stifling
• Psychology) the conscious exclusion of unacceptable thoughts or desires. (.
  • synonyms: inhibition