Backyard/ˌbækˈjɑːrd/ Definition 1 of 2Pro Tip 1/3Property Space Refers to a private area typically with grass, plants or leisure space outside a house. They installed a swing set in the backyard for the kids. Pro Tip 2/3Family Activities Often associated with family gatherings, outdoor activities, and relaxation. Every summer, we have a family reunion in my grandmother's backyard. Pro Tip 3/3Informal Events Used for casual, intimate events such as barbecues or picnics, unlike formal gardens. Let's have a backyard barbecue next weekend.