The Collaborative International Dictionary of English v.0.48:
Abstractionist \Ab*strac"tion*ist\, n. An idealist. --Emerson. [1913 Webster]WordNet (r) 3.0 (2006):
abstractionist adj 1: not representing or imitating external reality or the objects of nature; "a large abstract painting" [syn: abstract, abstractionist, nonfigurative, nonobjective] n 1: a painter of abstract pictures [syn: abstractionist, abstract artist]