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English definition of “retroactive”

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retroactive

adjective [not gradable]  /ˌre·troʊˈæk·tɪv/ us  
(of a law or other agreement) having effect from the time before the law or agreement was approved: I’m getting a retroactive salary increase.
retroactively
adverb [not gradable]  /ˌre·troʊˈæk·tɪv·li/ us  
The courts cannot apply a new rule retroactively.
Translations of “retroactive”
in Chinese (Traditional) 有追溯效力的, 溯及既往的…
in Chinese (Simplified) 有追溯效力的, 溯及既往的…
(Definition of retroactive from the Cambridge Academic Content Dictionary © Cambridge University Press)
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