retroact
verbEtymology From retro- + act.
1
To act retrospectively or in opposition
- In their eyes the past was good or bad for itself, and the present good or bad for itself, and an evil past could no more shadow a virtuous present than a virtuous present could retroact to brighten or redeem an ugly past.1884, Edward Bellamy, “Chapter 15”, in Miss Ludington's Sister:
2
to be retrospective.
3
Law To apply (a law) retroactively to situations that predate the enactment of the law.
- Sec. 4. The effectivity of this Act shall retroact to January 1, 2001.2001, Republic of the Philippines, Republic Act No. 9010: