D defs.my
Entry 1 sense Webster, 1913

Fireproofing

/fī'-ẽrp-ro͞ofˌ-ĭng/ · Fire·proof·ing · IPA /fˈaɪərprˌuːfɪŋ/
01 n. The act or process of rendering anything incombustible; also, the materials used in the process.
  1. 1.
    The act or process of rendering anything incombustible; also, the materials used in the process.