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