authorisation n.
chiefly British English spelling of authorization (q.v.); for spelling, see -ize.
Online Etymology Dictionary, © 2010 Douglas Harper Examples from the Web for authorisation Historical Examples of authorisation
I declined it because I had not your authorisation to accept it.
Henry James
I have not only the authorisation, but also the support of the government.
Gustave Aimard
She is insisting on having an authorisation for instituting proceedings.
V. G. Chertkov
She even furnished him with an authorisation to raise troops for this purpose.
Sabine Baring-Gould
You have my authorisation to prevent it, and you must rigorously do your duty.
Mr Jkai