Source : Webster's Revised Unabridged Dictionary (1913)

Res \Res\ (r?z), n.; pl. {Res}. [L.]
   A thing; the particular thing; a matter; a point.

   {Res gest[ae]} [L., things done] (Law), the facts which form
      the environment of a litigated issue. --Wharton.

   {Res judicata} [L.] (Law), a thing adjudicated; a matter no
      longer open to controversy.

Source : WordNet®

res judicata
     n : a matter already settled in court; cannot be raised again
         [syn: {res adjudicata}]