1. An approval, by an authority, generally one that makes something valid.
  2. A penalty, or some coercive measure, intended to ensure compliance; especially one adopted by several nations, or by an international body.
  3. A law, treaty, or contract, or a clause within a law, treaty, or contract, specifying the above.


  1. To ratify; to make valid.
  2. To give official authorization or approval to; to countenance.
  3. To penalize (a State etc.) with sanctions.

The above text is a snippet from Wiktionary: sanction
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