Arthur Rubinstein art·hur·ru·binstein uncommon noun 1. United States pianist (born in Poland) known for his interpretations of the music of Chopin (1886-1982) SynonymsRubinsteinArthur RubinsteinArtur Rubinstein Related words Broader terms pianist WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.