1. Rapid, uncontrolled, or unchecked expansion or increase of something, often referring to population, vegetation, crime, or economic activity
The city experienced rampant growth during the economic boom.
A cidade experimentou um crescimento descontrolado durante o boom econômico.
2. Excessive or unrestrained proliferation that exceeds normal or desired levels
Rampant growth of invasive species threatens the local ecosystem.
O crescimento descontrolado de espécies invasoras ameaça o ecossistema local.