[in-kuh m-buhs-tuh-buh l]
not combustible; incapable of being burned; fireproof.
an incombustible substance.
Origin of incombustible
Related formsin·com·bus·ti·bil·i·ty, in·com·bus·ti·ble·ness, nounin·com·bus·ti·bly, adverb
First recorded in 1425–75; late Middle English
word from Medieval Latin
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for incombustible
Historical Examples of incombustible
Carbon dioxide is incombustible, since it is, like water, a product of combustion.
It is a transparent gas, which is incombustible and extinguishes flame.
I think I may say I am old and incombustible enough to be trusted.
The fuse wire is usually enclosed in an incombustible holder.
It was burned in incombustible flax, with the orange-tree on which it used to perch.
British Dictionary definitions for incombustible
not capable of being burnt; fireproof
Derived Formsincombustibility or incombustibleness, nounincombustibly, adverb
an incombustible object or material
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for incombustible
late 15c., from Old French incombustible (14c.) or directly from Medieval Latin incombustibilis; see in- (1) + combustible.
Online Etymology Dictionary, © 2010 Douglas Harper