flameproof

F4L1A1M3E1P3R1O1O1F4

adjective

Resistant to catching fire.

Similar
fireproofflame-retardantnoncombustibleincombustible
OriginEnglish proof ← Middle English flawme ← Anglo-Norman flaume →
UncommonScrabble 20
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Meanings

adjectiveflameproof (comparative more flameproof, superlative most flameproof)

comparative more flameproof · superlative most flameproof · alternative flame-proof

  1. Resistant to catching fire.

    One hundred and fifty miles of flameproof wire have been used in the signalboxes and relay rooms.

    1952 December, “Brighton Line Resignalling, Southern Region”, in Railway Magazine, page 830

    Synonyms: fireproof

verbflameproof (third-person singular simple present flameproofs, present participle flameproofing, simple past and past participle flameproofed)

present singular third person flameproofs · participle present flameproofing · participle past flameproofed · past flameproofed · alternative flame-proof

  1. transitiveTo make flameproof.

    Structural timber in the roofs throughout the station has been flameproofed.

    1960 September, M. J. Wilson, “Harlow Town station opened”, in Trains Illustrated, page 542

Synonyms & antonyms

adjectiveResistant to catching fire.

Similar
fireproof

More synonyms by meaning

adjectiveresistant to catching fire

Similar
flame-retardantnoncombustibleincombustible
Also see
flame-retardantincombustiblenoncombustible

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

  1. Proto-Indo-European*bʰel-
  2. Proto-Italic*flagmā
  3. Latinflamma
  4. Old Frenchflame
  5. Anglo-Normanflaume
  6. Middle Englishflawme
  7. Englishflame
  8. Englishproof
  9. Englishflameproof

From flame + -proof.

Full word history & related roots →
Cite this entry
APA

flameproof. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/flameproof

MLA

“flameproof.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/flameproof. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “flameproof,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/flameproof.

Source: flameproof on Wiktionary, CC BY-SA 4.0.