im·pres·sion·ist 
(ĭm-prĕshə-nĭst)
(ĭm-prĕshə-nĭst)n.
1. An artist, composer, or writer who practices or upholds the theories of impressionism.
2. An entertainer who does impressions.
adj.
Of, relating to, or practicing impressionism, especially in painting; impressionistic.