Definition of run thin
- I'd been waiting almost an hour, and my patience was running thin.
: to go faster than a walk
: to move at a fast gallop
: flee, retreat, escape
: an act or the action of running : continued rapid movement
: a quickened gallop
: a migration of fish (as up or down a river) especially to spawn
: being in a melted state
: made from molten material : cast in a mold
: having made a migration or spawning run
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