resisting the effect of flames; not readily ignited or burned by flames.
verb (used with object)
to make flameproof.

1885–90; flame + -proof

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World English Dictionary
flameproof (ˈfleɪmˌpruːf)
1.  not liable to catch fire or be damaged by fire
2.  (of electrical apparatus) designed so that an internal explosion will not ignite external flammable gas

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
Heat the oil over medium-high heat in a flameproof, ovenproof roasting pan.
Wearing flameproof suits, workers heat stainless-steel ingots and pour the molten metal into ceramic casts.
Spread onion rings in an even layer in a large flameproof roasting pan and sprinkle with garlic and half of sage leaves.
Hand and body protection, such as gloves and flameproof welding coats and/or aprons are also used by welders without prompting.
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