adjective
1. unrestrained or uncontrollable; unbridled.
The period was characterized by rampant corruption in city government.
Vines are becoming rampant in the garden.
2. violent in nature or behavior; raging.
a rampant storm
3. of an animal, raised up on the hind legs as if to roar or pounce.
4. of an animal in heraldry, represented in profile with the body raised up on the left hind leg, with the right foreleg elevated above the left.
5. in architecture, rising from supports or abutments that are lower at one side than at the other.
a rampant arch