[Ha.sid] n, pl Ha.si.dim [Heb hasidh pious] (1812) 1: a member of a Jewish sect of the second century b.c. opposed to Hellenism and devoted to the strict observance of the ritual law
2. also Has.sid : a member of a Jewish mystical sect founded in Poland about 1750 in opposition to rationalism and ritual laxity -- Ha.sid.ic also Has.sid.ic adj