retroact
/ˌrɛtroʊˈækt/
verb
- To take effect from a date in the past; to apply retroactively.
- The new tax law will retroact to the beginning of the fiscal year.
- If the policy changes, it cannot retroact and punish actions that were legal before.
- The contract clause allows the agreement to retroact to the date of the initial handshake.
Antonyms