An upholstered two-seater with arms but no back, originally used in the nook of a window; sometimes built into bay windows.

A cushion covered bench built under a window.

A window seat is a miniature sofa without a back, intended to fill the recess of a window. In the latter part of the 18th century, when tall narrow sash windows were almost universal, the window seat was in high favor, and was no doubt in keeping with the formalism of Georgian interiors. It differed much in decorative detail, but little in form.