Also spelled tinder-box
Meanings
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1
noun
a small box holding tinder and usually a flint and steel, formerly used for starting fires
The rider struck a spark from the flint in his tinderbox.
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2
noun
a dry or highly flammable place or object that can catch fire easily
After weeks without rain, the scrubland had become a tinderbox.
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3
noun
a place or situation likely to erupt suddenly into violence or disorder
One reckless confrontation could turn the tense border region into a tinderbox.
Thesaurus
Etymology
A compound of tinder + box, recorded from the sixteenth century for a container holding dry tinder and spark-making tools. Its easy association with ignition produced the later figurative senses for fire-prone places and dangerously unstable situations.