The Collaborative International Dictionary of English v.0.48:

Antiquated \An"ti*qua`ted\, a.
   Grown old. Hence: Bygone; obsolete; out of use;
   old-fashioned; as, an antiquated law. "Antiquated words."
   --Dryden.
   [1913 Webster]

         Old Janet, for so he understood his antiquated
         attendant was denominated.               --Sir W.
                                                  Scott.
   [1913 Webster]

   Syn: Ancient; old; antique; obsolete. See Ancient.
        [1913 Webster]

WordNet (r) 3.0 (2006):

antiquated
    adj 1: so extremely old as seeming to belong to an earlier
           period; "a ramshackle antediluvian tenement";
           "antediluvian ideas"; "archaic laws" [syn:
           antediluvian, antiquated, archaic]