A place arched over with brick or stonework, and used for baking, heating, or drying; hence, any structure, whether fixed or portable, which may be heated for baking, drying, etc.; esp., now, a chamber in a stove, used for baking or roasting.
An appliance that is an enclosed compartment supplied with heat and used for cooking food. Toaster ovens are not considered ovens. The range stove top or burners and the oven are considered two separate appliances, although they are often purchased as one appliance.