Definition of noninflammable in US English:

noninflammable

adjective

  • Not catching fire easily; not flammable.

    • ‘The official gas mask, or respirator, consists of a metal container filled with material, which absorbs the gas, and a rubber face piece with a non-inflammable transparent window.’
    non-flammable, non-inflammable, flame-resistant, fire-resistant, flame-retardant, incombustible, uninflammable, unburnable
    View synonyms

Usage

Technically, there is no difference between nonflammable and noninflammable, but the preferred, less confusing choice is nonflammable. See also inflammable

Pronunciation

noninflammable

/ˌnɑnɪnˈflæməbəl//ˌnäninˈflaməbəl/