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

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