A recliner is an armchair or sofa that reclines when the occupant lowers the chair's back and raises its front. It has a backrest that can be tilted back, and often a footrest that may be extended by means of a lever on the side of the chair, or may extend automatically when the back is reclined. A recliner is also known as a reclining chair, lounger and an armchair. Recliners can also accommodate a near supine position for sleeping, and are common in airplanes and trains, as well as in homes.