Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
authorised is an adjective meaning "endowed with authority". It carries 2 recorded senses.
endowed with authority
sanctioned by established authority
“an authoritative communique”
“the authorized biography”
Definitions, synonyms and semantic relations for authorised come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.