1. treated with chemicals or made from materials that resist catching fire or burning

Examples

• The theater curtains were flameproofed to meet safety regulations.
• Workers wore flameproofed clothing in the chemical plant.
• The flameproofed fabric would not ignite even when exposed to direct flame.
• All upholstery in the hotel must be flameproofed by law.
• The flameproofed insulation helped prevent the fire from spreading.
• Children's pajamas are often made from flameproofed materials.