retroact
Definition
- Verb (intransitive):
- To act in a backward direction or have a reverse effect: "retroact" means to operate or take effect in a backward manner, often referring to laws, rules, or processes that apply to past events.
- To react or respond to past circumstances: In a broader sense, it can mean to act in response to something that has already occurred.
Usage Examples
- (The law applies to events that happened earlier in the year.)
- (The change cannot have a backward effect.)
- (The reaction had a reverse effect.)
Advanced Usage
- "to retroact upon": to have a backward effect on something.
- The court ruling retroacts upon all similar cases from the previous decade. (The ruling applies to earlier cases.)
Variants and Related Words
Retroaction (noun): the act of retroacting; a backward effect or reaction.
- The retroaction of the law caused confusion among taxpayers. (The backward application of the law created confusion.)
Retroactive (adjective): effective from a past date; having a backward effect.
- The retroactive pay raise covered the last six months. (The raise applied to a past period.)
Synonyms
- Apply retroactively: to take effect from a previous date.
- React backward: to respond in a reverse manner.
Related Idioms
- No idiom directly: "retroact" is a formal or technical term, not commonly used in idiomatic expressions.
Phrasal Verbs
- None: "retroact" is not typically used in phrasal verb constructions.
Additional Notes
- Legal Context: "retroact" is most frequently used in legal or formal discussions about legislation or contracts that have "retroactive effect." For example,
- Scientific Context: In science, "retroact" may describe a process that reverses or counteracts a prior action. For example,