apron

A flat broad piece of finished lumber or trim placed directly under a windowsill. 2.A flat piece of wood mounted under the base of a cabinet. 3. Same as counterflashing. 4. Same as apron flashing. 5. Paneling on the exterior of a building which serves as a protection against weather or as a decorative feature. 6. That portion of a concrete slab which extends beyond the face of a building on adjacent ground, as the extension of a garage floor. 7. A vertical panel at the back of a sink or lavatory. 8. In a theater, that part of a stage which projects into the audience area beyond the proscenium and curtain line; a forestage.