inflammable /ɪnˈflæməbəl/adjective 4noun 1forms 3 adjective4 •Capable of burning. •Easily set on fire. •(figurative) Easily excited; set off by the slightest excuse; easily enraged or inflamed. •(nonstandard) Incapable of burning; not easily set on fire. From in- + flammable, via backformation. noun1 •Any inflammable substance. formsinflammables · more inflammable · most inflammable