Adjective

(en adjective)

(originally) Rearing on both hind legs with the forelegs extended.

* The Vienna riding school displays splendid rampant movement.

(heraldry) Rearing on its hind leg(s), with a foreleg raised and in profile.

* Thomas Hardy, The Well-Beloved

little pieces of moustache on his upper lip, like a pair of minnows rampant

(architecture) Tilted, said of an arch with one side higher than the other, or a vault whose two abutments are located on an inclined plane.

Unrestrained or unchecked, usually in a negative manner.

* Weeds are rampant in any neglected garden.

* {{quote-magazine, date=2012-03

, author=William E. Carter, Merri Sue Carter , title=The British Longitude Act Reconsidered , volume=100, issue=2, page=87 , magazine= citation , passage=Conditions were horrendous aboard most British naval vessels at the time. Scurvy and other diseases ran rampant , killing more seamen each year than all other causes combined, including combat.}}

* 2013 , Phil McNulty, " Man City 4-1 Man Utd", BBC Sport , 22 September 2013:

In contrast to the despair of his opposite number, it was a day of delight for new City boss Manuel Pellegrini as he watched the rampant Blues make a powerful statement about their Premier League ambitions.

Rife, or occurring widely, frequently or menacingly.

* There was rampant corruption in the city.

Adjective

(en adjective)

Fertile, producing offspring or fruit in abundance — applied to plants producing fruit, animals producing young, etc.

Similarly producing results or works in abundance

* {{quote-news

, year=2012 , date=September 7 , author=Dominic Fifield , title=England start World Cup campaign with five-goal romp against Moldova , work=The Guardian citation , page= , passage=The most obvious beneficiary of the visitors' superiority was Frank Lampard. By the end of the night he was perched 13th in the list of England's most prolific goalscorers, having leapfrogged Sir Geoff Hurst to score his 24th and 25th international goals. No other player has managed more than the Chelsea midfielder's 11 in World Cup qualification ties, with this a display to roll back the years.}}