The definition of rampant is something that exists in large quantities or that grows and expands unrestrained.(adjective)
An example of rampant is when ants have invaded your kitchen.
See rampant in Webster's New World College Dictionary
Origin: ME < OFr, prp. of ramper: see ramp
See rampant in American Heritage Dictionary 4
Origin: Middle English rampaunt
Origin: , from Old French rampant
Origin: , present participle of ramper, to ramp; see ramp2.
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