Something inherited from a predecessor; a heritage, (law) a gift of personal property by will, A business with which one is intrusted by another; a commission; -- obsolete, except in the phrases last legacy, dying legacy, and the like, adjective_ Retained under an obsolescent or discarded system, chiefly for purposes of reference, left behind; old or no longer in active use, computing of a computer system that has been in service for many years and that a business still relies upon, even though it is becoming expensive or difficult to maintain