A green belt is protected countryside kept clear of building. Build on the green belt.
Its purpose is stopping towns from merging rather than protecting anything beautiful. Much of the green belt is ordinary farmland and some of it is a golf course.
1noungreen beltProtected countryside kept clear of building.
“The green belt around that city has held since 1955.”
green belt is a zone.
Green plus belt, from the ring of open land around a city; British policy dates from 1938 and 1947.
From green + belt.
Etymology from Wiktionary, CC BY-SA
Practised in In the City