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

Longoria’s approach to the wild fervour that continually swirls around the Velodrome was to try to harness it by hiring comparably combustible coaches like Jorge Sampaoli, Igor Tudor, Gennaro Gattuso and De Zerbi. —Tom Williams, New York Times, 17 May 2026

The song, performed by violinist Linda Lampenius and vocalist Pete Parkkonen, featured a potentially combustible mix of open flames and a flowing dress. —Andrew Jones, NBC news, 16 May 2026

And outlaw lovers in a wild and combustible romance! —Matt Grobar, Deadline, 15 May 2026

Grasses and brush thrive during heavy rains, then dry out quickly when the heat returns, turning into combustible fuel. —ArsTechnica, 14 May 2026

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