rampant
Americanadjective
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violent in action or spirit; raging; furious.
a rampant leopard.
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growing luxuriantly, as weeds.
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in full sway; prevailing or unchecked.
a rampant rumor.
- Synonyms:
- unrestrained, widespread, rife
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(of an animal) standing on the hind legs; ramping.
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Heraldry. (of a beast used as a charge) represented in profile facing the dexter side, with the body upraised and resting on the left hind leg, the tail and other legs elevated, the right foreleg highest, and the head in profile unless otherwise specified.
a lion rampant.
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Architecture. (of an arch or vault) springing at one side from one level of support and resting at the other on a higher level.
adjective
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unrestrained or violent in behaviour, desire, opinions, etc
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growing or developing unchecked
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(postpositive) heraldry (of a beast) standing on the hind legs, the right foreleg raised above the left
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(of an arch) having one abutment higher than the other
Other Word Forms
Etymology
Origin of rampant
First recorded in 1350–1400; Middle English, from Old French, literally, “creeping, climbing,” present participle of ramper “to creep, crawl, climb”; see ramp 1
Explanation
Rampant means wild or out of control. Unruly children might run rampant at the supermarket, knocking cereal boxes off shelves and thoroughly annoying the customers. If you're running rampant, you're on a rampage. Both come from the French word ramper meaning "to climb, creep" like an animal on hind legs, paws in climbing-mode, or like wild plants such as the kudzu that ran rampant over an old barn until the entire thing was covered. There can also be rampant wildfires that destroy houses in the Southwest, or robots that run rampant in the lab after the janitor accidentally sets them free.
Vocabulary lists containing rampant
The Diary of a Young Girl
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Beowulf
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This Week in Words: September 4 - 8, 2017
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Summer, a season of good eats and fresh produce, has been tainted by a rampant parasitic outbreak that’s made us all scared to indulge in a generous plate of Caesar salad.
From Salon ● Jul. 25, 2026
Near the base of a column atop which Saint Simeon Stylites once perched, scattered stones lay bare the damage inflicted on the surrounding Byzantine monastery in northern Syria by war, looting and rampant illegal excavations.
From Barron's ● Jul. 20, 2026
Ever since the White House announced it, speculation had run rampant.
From Slate ● Jul. 17, 2026
Two tries from flanker Jac Morgan allowed Wales somehow to keep a rampant Fiji side to 10-10 at half-time.
From BBC ● Jul. 4, 2026
If the gossip ran rampant and Ba tried to force me to marry, I could still get another job and move into some cheap rooming house.
From "The Red Car to Hollywood" by Jennie Liu
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
