Other forms: backyards
A backyard is the enclosed ground behind a house. In the backyard, a backyard barbecue, the backyard fence.
In America it means the garden; in Britain a backyard is paved and a garden has grass, which is a real difference. Not in my backyard is the standing phrase for objecting to something only because it is near you.
1nounbackyardThe enclosed ground behind a house.
“The kids played football in the backyard until it got dark.”
backyard is a yard.
Back plus yard, from Old English geard, an enclosure.
From back + yard.
Etymology from Wiktionary, CC BY-SA