greenfield

adjective
  1. relating to or denoting an area of land that has not been built on or developed before
  2. Usage: commonly used in business, urban planning, and real estate contexts
  3. relating to a new project or venture started from the beginning with no existing infrastructure or constraints
  4. Usage: business and technology usage
noun
  1. an area of undeveloped land, typically in or near a city, that could be built on
  2. Usage: urban planning and real estate term

Examples