Source : Webster's Revised Unabridged Dictionary (1913)

Valuable \Val"u*a*ble\, n.
   A precious possession; a thing of value, especially a small
   thing, as an article of jewelry; -- used mostly in the
   plural.

         The food and valuables they offer to the gods. --Tylor.

Valuable \Val"u*a*ble\, a.
   1. Having value or worth; possessing qualities which are
      useful and esteemed; precious; costly; as, a valuable
      horse; valuable land; a valuable cargo.

   2. Worthy; estimable; deserving esteem; as, a valuable
      friend; a valuable companion.

   {Valuable consideration} (Law), an equivalent or compensation
      having value given for a thing purchased, as money,
      marriage, services, etc. --Blackstone. --Bouvier.

Source : WordNet®

valuable
     adj 1: having great material or monetary value especially for use
            or exchange; "another human being equally valuable in
            the sight of God"; "a valuable diamond" [ant: {worthless}]
     2: having worth or merit or value; "a valuable friend"; "a good
        and worthful man" [syn: {worthful}]
     3: of great importance or use or service; "useful information";
        "valuable advice" [syn: {useful}, {of value}]
     n : something of value; "all our valuables were stolen"