Dictionary
ret•ro•ac•tive
Pronunciation: (re"trō-ak'tiv), [key]—
adj.
1. operative with respect to past occurrences, as a statute; retrospective:
a retroactive law.
2. pertaining to a pay raise effective as of a past date.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.