common land; public land; commons
Refers to land owned or used jointly by a community, such as a village common or shared pasture. Often used in historical or legal contexts.
In medieval villages, livestock were grazed on the common land.
This park was originally the town's common land.
私有地 is privately owned land, the opposite of 共有地.
Compound of 共有 (shared ownership) + 地 (land). The term is straightforward and modern, with no obscure historical derivation.