incombustible

[ in-kuh m-buhs-tuh-buh l ]
/ ˌɪn kəmˈbʌs tə bəl /

adjective

not combustible; incapable of being burned; fireproof.

noun

an incombustible substance.

Origin of incombustible

First recorded in 1425–75; late Middle English word from Medieval Latin word incombustibilis. See in-3, combustible

Related forms

in·com·bus·ti·bil·i·ty, in·com·bus·ti·ble·ness, nounin·com·bus·ti·bly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for incombustible

British Dictionary definitions for incombustible

incombustible

/ (ˌɪnkəmˈbʌstəbəl) /

adjective

not capable of being burnt; fireproof

noun

an incombustible object or material

Derived Forms

incombustibility or incombustibleness, nounincombustibly, adverb
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