Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
flame-retardant is an adjective meaning "resistant to catching fire". It carries one recorded sense.
resistant to catching fire
Definitions, synonyms and semantic relations for flame-retardant come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.