The work surface of a counter, island or peninsula, usually 36-inches high. It may be wood, plastic laminate, ceramic tile, marble, slate or solid surface (acrylic).
Top mounted surface of a cabinet, which is usually ceramic tile or synthetic marble or non-laminated plastic, depending on usage and cost. Certain countertops are more durable than others.
Countertop (also counter top, countertopping, or (British English) worktop) usually refers to a horizontal worksurface in kitchens, other food preparation areas, and workrooms in general. It is frequently installed above and supported by cabinets.