Meaning of “retrospective” in the English Dictionary

"retrospective" in British English

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retrospectivenoun [ C ]

uk /ˌret.rəˈspek.tɪv/ us /ˌret.rəˈspek.tɪv/

retrospectiveadjective

uk /ˌret.rəˈspek.tɪv/ us /ˌret.rəˈspek.tɪv/
retrospectively
adverb uk /ˌret.rəˈspek.tɪv.li/ us /ˌret.rəˈspek.tɪv.li/

Retrospectively, I can see where we went wrong.

(Definition of “retrospective” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"retrospective" in American English

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retrospectiveadjective

us /ˌre·trəˈspek·tɪv/

looking back over the past:

He was the subject of a retrospective exhibit.

(Definition of “retrospective” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"retrospective" in Business English

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retrospectiveadjective

uk /ˌretrəʊˈspektɪv/ us /ˌretrəˈspektɪv/ LAW

if a law, decision, etc. is retrospective, it has effect from a date in the past before it was approved:

The new law will not be retrospective.
He described stamp duty on property transactions as 'an unfair and retrospective tax' on long-term savers.

See also

(Definition of “retrospective” from the Cambridge Business English Dictionary © Cambridge University Press)