impressionist (adj., n.)

in reference to a style of painting aiming to represent overall impressions as they first strike the eye rather than exact details, 1876 (adjective and noun), from French, coined 1874 by French critic Louis Leroy ("école impressionniste") in a disparaging reference to Monet's sunset painting "Impression, Soleil Levant." Later extended to other arts.

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Definitions of impressionist from WordNet

impressionist (adj.)
relating to or characteristic of Impressionism;
impressionist music
Synonyms: impressionistic