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comparative more flameproof, superlative most flameproof
Resistant to catching fire. examples
third-person singular simple present flameproofs, present participle flameproofing, simple past and past participle flameproofed
(transitive) To make flameproof. quotations examples
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