ram ‧ pant /ˈræmpənt/ BrE AmE adjective
[ Date: 1300-1400 ; Language: French ; Origin: present participle of ramper 'to climb, crawl' ]
1 . if something bad, such as crime or disease, is rampant, there is a lot of it and it is very difficult to control ⇨ rife , widespread :
Pickpocketing is rampant in the downtown area.
rampant inflation
2 . a plant that is rampant grows and spreads quickly, in a way that is difficult to control
—rampantly adverb