What is the meaning of authorised?

verb

• Give or delegate power or authority to.
  • usage: "She authorized her assistant to sign the papers"
  • synonyms: empower, authorise, authorize
• Grant authorization or clearance for.
  • usage: "Clear the manuscript for publication"; "The rock star never authorized this slanderous biography"
  • synonyms: authorize, authorise, pass, clear

adjective

• Endowed with authority.
  • synonyms: authorized
• Sanctioned by established authority.
  • usage: "an authoritative communique"; "the authorized biography"
  • synonyms: authoritative, authorized