Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
synchronised is an adjective meaning "operating in unison". It carries one recorded sense.
operating in unison
“the synchronized flapping of a bird's wings”
Definitions, synonyms and semantic relations for synchronised come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.