Merriam-Webster's Collegiate® Dictionary, 11th Edition
LEGACY
I. noun (plural -cies)
Etymology: Middle English legacie office of a legate, bequest, from Anglo-French or Medieval Latin; Anglo-French, office of a legate, from Medieval Latin legatia, from Latin legatus
Date: 15th century
a gift by will especially of money or other personal property ; bequest , something transmitted by or received from an ancestor or predecessor or from the past ,
II. adjective
Date: 1990
of, relating to, or being a previous or outdated computer system