Hasidism n 1: a sect of Orthodox Jews that arose out of a pietistic movement originating in eastern Europe in the second half of the 18th century; a sect that follows the Mosaic law strictly [syn: {Hasidim}, {Hassidim}, {Hasidism}, {Chasidim}, {Chassidim}] 2: beliefs and practices of a sect of Orthodox Jews [syn: {Hasidism}, {Hassidism}, {Chasidism}, {Chassidism}]