Meaning of retroactive

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.
See also: