Added 9 October 2026 flammability noun Categories: Describing WordsRare Words noun ! Definition from WordNet 3.1, Princeton University. More about flammability at Wordnik → Where our words come from → The quality of being easily ignited and burning rapidly. Related Words: flammableinflammationignitioncombustionflameinflammatoryfireswellinginflammabilityinflammablenesscombustiblenessignitability Back to today's word