# retroact

> English word · Verb

## Definitions
1. To act retrospectively or in opposition
2. to be retrospective.
3. To apply (a law) retroactively to situations that predate the enactment of the law.

## Etymology
From retro- + act.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/retroact