retroactive
ret·roac·tive
adjective
1.
descriptive of any event or stimulus or process that has an effect on the effects of events or stimuli or process that occurred previously
2.
- “retroactive tax increase”
- “an ex-post-facto law”
- “retro pay”
Origin
First attested in 1610. From French rétroactif, equivalent to retro- + active.
Related words
Word family
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.