Definitions

from The American HeritageĀ® Dictionary of the English Language, 4th Edition

  • adj. Not flammable, especially not readily ignited and not rapidly burned.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Not combustible.
  • adj. Not easily set on fire.
  • n. Any nonflammable substance.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Not easily ignited, and burning only slowly if ignited.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. impossible to ignite

Etymologies

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