au ‧ thor ‧ i ‧ za ‧ tion BrE AmE ( also authorisation British English ) /ˌɔːθəraɪˈzeɪʃ ə n $ ˌɒːθ ə rə-/ noun [uncountable and countable]
[ Word Family: noun : ↑ authority , ↑ authorization , ↑ authoritarian , ↑ authoritarianism ; adjective : ↑ authoritarian , ↑ authoritative , authorized ≠ ↑ unauthorized ; verb : ↑ authorize ; adverb : ↑ authoritatively ]
official permission to do something, or the document giving this permission SYN authority :
You need special authorization to park here.
Children may not leave the building without the authorization of the principal.