A lawn is a cultivated, mowed field planted with grass and sometimes clover. Lawns are typically planted near homes, often as part of gardens. The purpose of a lawn is to create a comfortable space upon which games can be played, picnics held, and any other social events happen. Typical middle-class homes in North America and Great Britain commonly have lawns surrounded by a hedge or fence.

Lawns are also a common feature of public parks and the playing surface for most outdoor sports including golf, tennis, football, soccer, bowling, and others. In sports venues, the term lawn is usually replaced by turf or green.

See also; Organic lawn management, Lawn mower