# retroactivity

> English word · Noun

## Definitions
1. The state or characteristic of being retroactive.
2. The application of a law to events that took place before it was made.

## Etymology
From retroactive + -ity.

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