- Obsolete a metal box for holding tinder, flint, and steel for starting a fire
- any highly flammable object, structure, etc.
- a place or situation likely to be the source of a flare-up of trouble, war, etc.
See tinderbox in American Heritage Dictionary 4
- A metal box for holding tinder.
- A potentially explosive place or situation: referred to the crowded prison as a tinderbox of suppressed violence.
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