combustible

adjective

com·​bus·​ti·​ble kəm-ˈbə-stə-bəl 

1

: capable of combustion

combustible materials, such as paper, leaves, and sawdust

combustible gases

2

: easily excited

a combustible temper

The coach had to keep the combustible players under control.

combustibility

kəm-ˌbə-stə-ˈbi-lə-tē 

noun

combustible noun

combustibly

kəm-ˈbə-stə-blē 

adverb

Synonyms of combustible

• explosive
• combustive
• flammable
• inflammable
• ignitable
• fiery

Examples of combustible in a Sentence

The fuel is highly combustible.

don't store oily rags and other combustible materials in a hot attic

Recent Examples on the Web

According to charging documents, the building was already at risk of collapse after there had been two fires in 2015 and 2016, causing the structure to be filled with potential combustible debris, such as trash and charred wood. —Harrington Gardiner, CBS News, 17 Nov. 2025

Still Flipping Out will find Lewis to be as outspoken as ever, juggling his Radio Andy show, his design business, and his combustible personality. —Armando Tinoco, Deadline, 14 Nov. 2025

In Season 2, there will be more drama as Ainsley preps for college and the combustible Norrises attempt another family dinner. —Bryan Alexander, USA Today, 14 Nov. 2025

There are swift, serpentine vines dexterous enough to snatch Dek’s supplies; combustible little slugs that detonate like grenades when triggered; and exotic flowers that swell up and squirt paralyzing darts when something approaches. —Peter Debruge, Variety, 4 Nov. 2025

Word History

Etymology

borrowed from Medieval Latin combustibilis, from Latin combustus (past participle of combūrere "to destroy with fire, combust") + -ibilis -ible

First Known Use

1529, in the meaning defined at sense 1

Rhymes for combustible

• adjustable
• incombustible
• noncombustible

Kids Definition

combustible

adjective

com·​bus·​ti·​ble kəm-ˈbəs-tə-bəl 

1

: capable of being burned

2

: catching fire or burning easily

combustibility

-ˌbəs-tə-ˈbil-ət-ē 

noun

combustible noun

Medical Definition

combustible

adjective

com·​bus·​ti·​ble kəm-ˈbəs-tə-bəl 

: capable of combustion

combustible anesthetics