retroactive

Describes a law, rule, or decision that takes effect from a date in the past rather than from the present or future.

ruОписывает закон, правило или решение, которое вступает в силу с даты в прошлом, а не с настоящего или будущего момента.esDescribe una ley, norma o decisión que tiene efectos desde una fecha pasada, en lugar de desde el momento presente o futuro.frSe dit d'une loi, d'une règle ou d'une décision qui prend effet à une date antérieure à son adoption, c'est-à-dire à partir d'un moment dans le passé plutôt qu'à partir du présent ou de l'avenir.deBezeichnet Gesetze, Regeln oder Entscheidungen, die rückwirkend ab einem früheren Zeitpunkt gelten statt ab dem aktuellen oder einem zukünftigen Zeitpunkt.ptDiz-se de lei, regra ou decisão que passa a valer a partir de uma data no passado, e não do momento presente ou futuro.zh指法律、规则或决定从过去的某一日期起生效，而不是从现在或将来生效。arيصف قانونًا أو قاعدة أو قرارًا يسري مفعوله من تاريخ سابق في الماضي، لا من الحاضر أو المستقبل. ويُستعمل أيضًا لوصف أثر يرجع إلى ما قبل وقت تنفيذه.

1. Having effect on the past C1 formal

   Describes a law, rule, or action that takes effect from a date in the past, rather than from the present or future.

   • The new tax law was made retroactive to the beginning of the fiscal year.
   • The salary increase was applied retroactively for the previous three months.
   • A retroactive change to the contract caused confusion among the employees.

   ruИмеющий обратную силуesRetroactivofrrétroactifdeRückwirkende Kraft habendptCom efeito retroativozh有追溯效力的arذو أثر رجعي

   Synonyme: ex post factoretrospective

   Antonyme: forward-lookingfutureprospective

2. Influencing previous events C2 formal

   Descriptive of any event, stimulus, or process that has an effect on the effects of events, stimuli, or processes that occurred previously.

   • The therapy had a retroactive effect, altering the patient's memory of the trauma.
   • The new policy was retroactive, impacting decisions made years ago.
   • Scientists studied the retroactive influence of the initial conditions on the experiment's outcome.

   ruРетроактивныйesretroactivofrrétroactifdeRückwirkendptRetroativozh追溯性的arرجعي الأثر

   Synonyme: ex post factoretroretrospective

• more retroactive comparative form
• most retroactive superlative form