The Collaborative International Dictionary of English v.0.48:

Oven \Ov"en\ ([u^]v"'n), n. [AS. ofen; akin to D. oven, OHG.
   ofan, ovan, G. ofen, Icel. ofn, Dan. ovn, Sw. ugn, Goth.
   a['u]hns, Gr. 'ipno`s, Skr. ukh[=a] pot.]
   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.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Appliance \Ap*pli"ance\, n.
   1. The act of applying; application.
      [1913 Webster]

   2. subservience; compliance. [Obs.] --Shak.
      [1913 Webster]

   3. A thing applied or used as a means to an end; an apparatus
      or device; as, to use various appliances; a mechanical
      appliance; a machine with its appliances.
      [1913 Webster]

   4. Specifically: An apparatus or device, usually powered
      electrically, used in homes to perform domestic functions.
      An appliance is often categorized as a major appliance or
      a minor appliance by its cost. Common major appliances are
      the refrigerator, washing machine, clothes drier,
      oven, and dishwasher. Some minor appliances are a
      toaster, vacuum cleaner or microwave oven.
      [PJC]

WordNet (r) 3.0 (2006):

oven
    n 1: kitchen appliance used for baking or roasting