Syllable division and stress derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
LXIII is the Roman numeral for 63. WordNet records it as an adjective meaning "being three more than sixty". It carries one recorded sense.
LXIII=63
Read from the numeral itself, and checked against the entry below — WordNet lists 63 among the synonyms of lxiii.
Convert any Roman numeralbeing three more than sixty
Definitions, synonyms and semantic relations for lxiii come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.