Rubinstein n 1: United States pianist (born in Poland) known for his interpretations of the music of Chopin (1886-1982) [syn: {Arthur Rubinstein}, {Artur Rubinstein}] 2: Russian composer and pianist (1829-1894) [syn: {Anton Rubenstein}, {Anton Gregor Rubinstein}, {Anton Grigorevich Rubinstein}]