Definitions of legacy
money or property left to someone in a will (=a document that says what you want to happen to your money and property after you die)
Michael Jackson left a reported £1billion legacy to his mother and his three children.
something that someone or a group has done that continues to exist after the person dies or the group stops working; something that is a part of your history
When people ride along the new track, I hope it will remind them of the legacy of the Olympics.