Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
lusterless is an adjective meaning "lacking brilliance or vitality". It carries 2 recorded senses.
lacking brilliance or vitality
“a dull lackluster life”
“a lusterless performance”
Definitions, synonyms and semantic relations for lusterless come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.