Nonflammable
adj.capable, resilientprofessional
What it means
Not readily capable of catching fire under the conditions for which it is rated.
Reach for it when describing a material chosen to reduce ignition risk in a stated use
The enclosure uses nonflammable panels around the electrical cabinet.
Choose between these
5- everyday
fire-safe
general readers need a practical safety description backed by context
not when Fire-safe is vague and cannot substitute for a certification.
- professional
a tested material slows ignition or flame spread for a specified time
not when Fire resistance is graded; the material may still burn.
- professional
treatment delays ignition or reduces burning
not when Retardant material may still ignite and can lose protection over time.
- formal
inert
chemical stability is the relevant reason ignition is unlikely
not when Inert does not automatically establish behavior at high temperatures.
- formal
noncombustible
the applicable standard classifies the material as not contributing fuel
not when A technical classification should not be claimed without the named test.
Said against
3- flammable
- combustible
- ignitable
It naturally appears in
3- nonflammable insulation
Nonflammable insulation surrounds the escape corridor.
- nonflammable surface
The nonflammable surface did not feed the small test flame.
- nonflammable material
Engineers specified nonflammable material beside the furnace housing.
Where this comes from
Nonflammable is used here as a context-bound safety property, not a promise that a product is safe in every fire condition.
- wiktionary, English adjective, definition 1 opens in a new tab · retrieved 2026-07-26
The definition and the example on this page are written here. The dictionaries above ground which meaning is being described, not the wording.