Dictionary.com
Thesaurus.com
Synonyms

retroactive

American  
[re-troh-ak-tiv] / ˌrɛ troʊˈæk tɪv /

adjective

  1. operative with respect to past occurrences, as a statute; retrospective.

    a retroactive law.

  2. pertaining to a pay raise effective as of a past date.


retroactive British  
/ ˌrɛtrəʊˈæktɪv /

adjective

  1. applying or referring to the past

    retroactive legislation

  2. effective or operative from a date or for a period in the past

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms


Etymology

Origin of retroactive

First recorded in 1605–15; retro- + active


Explanation

The adjective retroactive refers to something happening now that affects the past. For example, a retroactive tax is one that is passed at one time, but payable back to a time before the tax was passed. The Latin word retroagere, an ancestor of the adjective retroactive, means "drive or turn back," and goes along with the meaning of the word. Sometimes governments pass rulings that are set as if they were in effect before the ruling was even made, and that means they are retroactive. On the bright side, you might be awarded a salary raise that is retroactive, meaning you'll get paid more for work you did in the past. And, retroactive fads in clothing keep vintage clothing stores in business.

Keep Reading on Vocabulary.com

Vocabulary lists containing retroactive

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

It would bar retroactive taxes on past earnings.

From Los Angeles Times ● Aug. 12, 2026

While the Social Security Administration has already processed most adjustments and issued many retroactive payments, some retirees are still waiting because of administrative backlogs and complex eligibility cases, according to the publication Government Executive.

From MarketWatch ● Aug. 10, 2026

“Because we focus so much on the kind of retroactive or reactionary human caseload, we miss the opportunity to control the vector and to understand more about the vector,” LaDeau said.

From Slate ● Aug. 4, 2026

The auditor recommended that the school “seek retroactive approval from the Illinois Attorney General for the endowment borrowings.”

From The Wall Street Journal ● Aug. 3, 2026

“That suit is so beautiful. It’s so retroactive. It’s so retroactive that it’s radioactive!”

From "The Absolutely True Diary of a Part-Time Indian" by Sherman Alexie

Random Word

Spin the wheel and learn a new word!

Get a word

Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember new words for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com