Definition of run rampant
- Rumors of her engagement ran rampant.
: 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
: rearing upon the hind legs with forelegs extended
: standing on one hind foot with one foreleg raised above the other and the head in profile
: marked by a menacing wildness, extravagance, or absence of restraint
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