- not flammable; not combustible or easily set on fire.
Origin of nonflammable
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- incapable of burning or not easily set on fire; not flammable
- Not flammable, especially not readily ignited and not rapidly burned.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.