Designed or treated so that it won't catch fire easily or at all when exposed to flame or high heat.
From English 'flame' plus 'proof,' combining the idea of being resistant or protected against flame (as in 'waterproof' or 'weatherproof'). This compound became standard in the early 20th century with advances in fire-resistant textiles and materials.
Modern flameproof fabrics don't make materials invisible to fire—they make them self-extinguishing, meaning the flame goes out on its own when the heat source is removed, which saves lives in emergencies.
Complete word intelligence in one call. Free tier — 50 lookups/day.