Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
all-around is an adjective meaning "many-sided". It carries one recorded sense.
many-sided
“an all-around athlete”
“a well-rounded curriculum”
Definitions, synonyms and semantic relations for all-around come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.