0 used to refer to land that has not yet been built on, or buildings built on land that had never been used before for building: --
a greenfield site
1 land in the countryside or around cities that has never had buildings on it before: --
We will build on urban brownfield first and only then on greenfield.
2 used to describe an area of land that has never had buildings on it before, or buildings that have been put on this land for the first time: --
There was strong opposition in the area to construction on greenfield land.
greenfield building/development
3 used to describe a company or an area of business that is completely new: --
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
Vi kan slutföra det steg för steg hur lång vägen än är och den kan inte slutföras hur kort vägen än är om du inte ens markerar ditt fotavtryck.