the grounds in back of a house
"The children played tag in the backyard while their parents watched from the porch."
A yard to the rear of a house or similar residence.
"The children played tag in the backyard behind the house."
In plain English: A backyard is the small area of grass and dirt behind your house where you can play outside.
"The children spent their afternoon playing soccer in the backyard."
Usage: A backyard refers specifically to the area behind a home, distinct from a front lawn which faces the street. This space is commonly used for recreation and gardening immediately adjacent to residential properties.
The word backyard is a straightforward compound formed by combining back and yard. It has been used to describe the area of ground behind a house since at least the early 17th century.