Legacy

[leg-uh-see] /ˈlɛg ə si/

noun, plural legacies.
1.
Law. a gift of property, especially personal property, as money, by will; a bequest.
2.
anything handed down from the past, as from an ancestor or predecessor:
the legacy of ancient Rome.
3.
an applicant to or student at a school that was attended by his or her parent.
4.
Obsolete. the office, function, or commission of a legate.
adjective
5.
of or relating to old or outdated computer hardware, software, or data that, while still functional, does not work well with up-to-date systems.
/ˈlɛɡəsɪ/
noun (pl) -cies
1.
a gift by will, esp of money or personal property
2.
something handed down or received from an ancestor or predecessor
3.
(modifier) surviving computer systems, hardware, or software: legacy network, legacy application
n.

late 14c., “body of persons sent on a mission,” from Old French legatie “legate’s office,” from Medieval Latin legatia, from Latin legatus “ambassador, envoy,” noun use of past participle of legare “appoint by a last will, send as a legate” (see legate). Sense of “property left by will” appeared in Scottish mid-15c.

legacy system