(adj) of or relating to or based on an impression rather than on facts or reasoning, Example:a surprisingly impressionistic review bearing marks of hasty composition; she had impressionistic memories of her childhood
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
n. [ F. impressionniste. ] (Fine Arts) One who adheres to the theory or method of impressionism in art; especially, a painter who paints in the impressionistic style; as, the skyrocketing prices of paintings by the French impressionists. [ 1913 Webster ]