School grounds are those areas that are not enclosed or substantially enclosed and are used exclusively or mainly by the school for educational, sporting or recreational purposes.
Tir ysgolion yw’r mannau hynny nad ydynt yn gaeedig neu’n sylweddol gaeedig, a chânt eu defnyddio’n unig neu’n bennaf gan yr ysgol at ddibenion addysgol, chwaraeon neu ddibenion hamdden.