Dictionary.com
Thesaurus.com
Synonyms

incombustible

American  
[in-kuhm-buhs-tuh-buhl] / ˌɪn kəmˈbʌs tə bəl /

adjective

  1. not combustible; incapable of being burned; fireproof.


noun

  1. an incombustible substance.

incombustible British  
/ ˌɪnkəmˈbʌstəbəl /

adjective

  1. not capable of being burnt; fireproof

"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

noun

  1. 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

Other Word Forms

  • incombustibility noun
  • incombustibleness noun
  • incombustibly adverb

Etymology

Origin of incombustible

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

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The cruel lesson: Invest in incombustible masonry and stone, or pay the fiery piper.

From Seattle Times • May 30, 2019

On buildings that are “higher than the firefighters’ ladders,” incombustible material must be used, Arconic advises in a fire-safety pamphlet.

From Seattle Times • Jul. 20, 2017

“As soon as the building is higher than the firefighters’ ladders, it has to be conceived with an incombustible material,” a caption says.

From New York Times • Jun. 24, 2017

In other European countries, Arconic’s sales materials explicitly instructed that “as soon as the building is higher than the firefighters’ ladders, it has to be conceived with an incombustible material.”

From New York Times • Jun. 24, 2017

Azazel, Statistics Chief, glanced at a roll of incombustible microfilm, and cleared his throat.

From Satan and the Comrades by Bennitt, Ralph