Word.ws English Dictionary

unflammable

unflammable adjective: not flammable.

Adjective

unflammable (comparative more unflammable, superlative most unflammable)

  1. Not flammable.
    • Refrigerators used for flammables should be unflammable material storage units or explosion-free.1999, Maria Csuros, Csaba Csuros, Microbiological Examination of Water and Wastewater, Lewis Publishers, →ISBN, page 111
    • Many of the silane-based penetrants are alcohol- or solvent-based and flammable. The nature of AAS used in this study is unflammable and unvolatile, which allowed for construction safety;2008, ACI Materials Journal, page 21

Synonyms of unflammable

Forms of unflammable

comparativemore unflammable
superlativemost unflammable

Origin of unflammable

From un- + flammable.

Questions about unflammable

What does unflammable mean?
Unflammable means not flammable.
What part of speech is unflammable?
Unflammable is an adjective.

Words near unflammable in the dictionary

  1. unflamboyance
  2. unflamboyant
  3. unflamboyantly
  4. unflamed
  5. unflaming
  6. unflammable
  7. unflanged
  8. unflankable
  9. unflanked
  10. unflanneled
  11. unflannelled

Source and license

Adapted from Wiktionary: unflammable (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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