heat-proof From WikiWord, the free dictionary English Contents DefinitionsRelated wordsReferences DefinitionsadjectiveUnable to be affected or damaged by heat. Related wordsSynonymsrefractoryunheatableundamageableresistantbreakproofimperviousscratch-proofnondamageablenonbreakableinvulnerableunmeltableinfrangibleinviolableunaffectableunharmableundestroyable References Wiktionary — heat-proof Wikipedia — heat-proof