buffer zone

noun
  1. A neutral area serving to separate hostile forces or nations, intended to prevent conflict or escalation of tensions. noun
    The United Nations established a buffer zone between the two countries to prevent further hostilities.
    The demilitarized buffer zone was patrolled by peacekeeping forces to ensure compliance with the ceasefire agreement.
  2. An area designed to separate different land uses or to protect a particular area from encroachment or disturbance. noun
    The city planners included a buffer zone of green space between the industrial park and the residential neighborhood.
    Environmental regulations require a buffer zone around the wetland to protect it from agricultural runoff.