n.
 (pl. legacies)
  - an amount of money or property left to someone in a will.
 - something handed down by a predecessor.
 
adj.
 Computing  denoting hardware or software that has been superseded but is difficult to replace because of its wide use.
 
  Etymology
  ME (also denoting the function or office of a legate): from OFr. legacie, from med. L. legatia ‘legateship’, from legatus (see legate).