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.
LIII is the Roman numeral for 53. WordNet records it as an adjective meaning "being three more than fifty". It carries one recorded sense.
LIII=53
Read from the numeral itself, and checked against the entry below — WordNet lists 53 among the synonyms of liii.
Convert any Roman numeralbeing three more than fifty
Definitions, synonyms and semantic relations for liii come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.