1.
playing field, sports ground, athletic field
An open outdoor area used for sports and athletic activities, typically at schools or public facilities. In Japanese, グラウンド specifically refers to an unpaved or dirt playing field.
Usage
グラウンド in Japanese refers specifically to an outdoor playing field, often unpaved (dirt or sand surface). It is the standard word for school athletic fields and sports grounds. It differs from the English "ground" in that it does not mean the earth or floor in general.
The abbreviation グランド is also sometimes used, and 校庭 (school yard) overlaps in meaning for school contexts.