Definition of "combustible"

Sin is to the soul like fire to combustible matter.

1692–1717, Robert South, Twelve Sermons Preached upon Several Occasions, 6th edition, volumes (please specify |volume=I to VI), London: […] J[ames] Bettenham, for Jonah Bowyer, […], published 1727

The rest were undergoing special underbody cleaning safety checks at TfW depots, after speculation that the cause of the incidents may have been a build-up of engine oil and combustible material such as fallen leaves and general detritus.

2023 March 22, “Network News: Class 175s withdrawn for safety checks after fires”, in RAIL, number 979, page 13

Arnold, however, was a combustible character.

1855–1859, Washington Irving, The Life of George Washington

The world’s richest man has inserted himself in some of the world’s most combustible conflicts.

2022 October 26, Cade Metz, Adam Satariano, Chang Che, “How Elon Musk Became a Geopolitical Chaos Agent”, in The New York Times‎

A wheel, wrapt in combustibles, was kindled and rolled down the hill.

1890, James George Frazer, The Golden Bough, volume 2, page 248