[only before noun] used to describe an area of land in a city that was used by industry or for offices in the past and that may now be cleared for new building development棕色地带的（指城市里过去的工厂或办公用地，现在可清理平整为新的建设项目用地）⨁a brownfield site棕色地带工地 ⨁ brownfield development / land棕色地带的开发／土地  ➡  greenfield