Source : WordNet®

authorisation
     n 1: a document giving an official instruction or command [syn: {mandate},
           {authorization}]
     2: the power or right to give orders or make decisions; "he has
        the authority to issue warrants"; "deputies are given
        authorization to make arrests" [syn: {authority}, {authorization},
         {dominance}, {say-so}]
     3: official permission or approval; "authority for the program
        was renewed several times" [syn: {authority}, {authorization},
         {sanction}]
     4: the act of conferring legality or sanction or formal warrant
        [syn: {authorization}, {empowerment}]