Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

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

from the GNU version of the Collaborative International Dictionary of English.

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

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective Not combustible.
  • adjective Not easily set on fire.
  • noun Any nonflammable substance.

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

  • adjective impossible to ignite

Etymologies

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