What is the meaning of mandate?

noun

• A document giving an official instruction or command.
  • synonyms: authorization, authorisation
• A territory surrendered by Turkey or Germany after World War I and put under the tutelage of some other European power until they are able to stand by themselves.
  • synonyms: mandatory
• The commission that is given to a government and its policies through an electoral victory.

verb

• Assign under a mandate.
  • usage: "mandate a colony"
• Make mandatory.
  • usage: "the new director of the school board mandated regular tests"
• Assign authority to. .