Flammable
//ˈflæməbəl// adj, noun
adj, noun ·Uncommon ·Advanced level
Definitions
Noun
- 1 Any flammable substance.
Adjective
- 1 Capable of burning.
"flammable liquid"
- 2 Easily set on fire.
- 3 Easily set on fire.; Subject to easy ignition and rapid flaming combustion.
- 4 Very likely to cause fighting or controversy; extremely contentious. figuratively
"In considering the possible commitment of U.S. forces to South Vietnam , the Joint Chiefs of Staff have reviewed the overall critical situation in Southeast Asia with particular emphasis upon the present highly flammable situation in South Vietnam."
Adjective
- 1 easily ignited wordnet
Example
More examples"Gasoline is more flammable than fuel oil."
Etymology
Back-formation from inflammable, which is used to avoid confusion with non-flammable, as the prefix in- is often used to mean "un-; non-", although it was originally meant in a sense closely related to en-.
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.