Definition of "tinderbox"

Haines helped himself and snapped the case to. He put it back in his sidepocket and took from his waistcoatpocket a nickel tinderbox, sprang it open too, and, having lit his cigarette, held the flaming spunk towards Stephen in the shell of his hands.

1922 February, James Joyce, “[Episode 1: Telemachus]”, in Ulysses, Paris: Shakespeare and Company, […], part I [Telemachia], pages 19–20

Just bring me the old tinderbox that my grandmother forgot the last time she went down there.

2007, Stephen Mitchell, The Tinderbox, page 5

And then came the night that made America famous / Was it carelessness or someone's sick idea of a joke? / In the tinderbox trap that we hippies lived in, someone struck a spark

1974, Harry Chapin (lyrics and music), “What Made America Famous”, in Verities & Balderdash

Think of your blank journal as a tinderbox, a box for holding combustible materials, ready to catch fire when you sit down to work.

2010, L. K. Ludwig, Creative Wildfire: An Introduction to Art Journaling, page 30

This act was the "match that ignited the great tinderbox of fuel" that had been building for years between many of the countries in Europe.

2010, H. S. Haskell, Sagebrush Or Gold Dust, page 291