flameproof

[ fleym-proof ]
/ ˈfleɪmˌpruf /

adjective

resisting the effect of flames; not readily ignited or burned by flames.

verb (used with object)

to make flameproof.

Origin of flameproof

First recorded in 1885–90; flame + -proof
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for flameproof

flameproof

/ (ˈfleɪmˌpruːf) /

adjective

not liable to catch fire or be damaged by fire
(of electrical apparatus) designed so that an internal explosion will not ignite external flammable gas
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012