This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Looking back on, contemplating, or directed to the past.

adj. Looking or directed backward.

adj. Applying to or influencing the past; retroactive.

adj. Of, relating to, or being a retrospective: a retrospective art exhibition.

n. An exhibition or performance of works produced by an artist over a considerable period.

adj. of, relating to, or contemplating the past

adj. looking backwards

adj. affecting or influencing past things; retroactive

n. an exhibition of works from an extended period of an artist's activity

adj. Looking backward; contemplating things past; -- opposed to prospective.

adj. Having reference to what is past; affecting things past; retroactive.

Looking backward; considering the past.

In law, retroactive; affecting matters which occurred before it was adopted: as, a retrospective act, law, or statute.

Capable of being looked back to; occurring in the past; bygone.

adj. concerned with or related to the past

n. an exhibition of a representative selection of an artist's life work

"Between 60 and 41 yesterday we included a four-sided memoir of a one-of-a-kind childhood, a big retrospective from a master of the short-short-short story, a delirious trilogy-ender from the Demon Dog himself, a tiny and spellbindingly lovely novel of memory, and a travel tale far smarter than its sexpot cover would lead you to think."

ex post facto    retroactive    retro-   

art exhibition   

scholarly    analog   

retroactive    backward   

affective    anti-infective    collective    connective    convective   

in-depth    cursory    first-hand    exhaustive    sociological