What is the meaning of countenance?

noun

• The appearance conveyed by a person's face.
  • usage: "a pleasant countenance"; "a stern visage"
  • synonyms: visage
• Formal and explicit approval.
  • usage: "a Democrat usually gets the union's endorsement"
  • synonyms: sanction, endorsement, indorsement, warrant, imprimatur
• The human face (`kisser' and `smiler' and `mug' are informal terms for `face' and `phiz' is British.
  • synonyms: physiognomy, phiz, visage, kisser, smiler, mug

verb

• Consent to, give permission.
  • usage: "She permitted her son to visit her estranged husband"; "I won't let the police search her basement"; "I cannot allow you to see your exam"
  • synonyms: permit, allow, let