of or pertaining to any of the strict Mennonite groups, chiefly in Pennsylvania, Ohio, Indiana, and Canada, descended from the followers of Jakob Ammann, a Swiss Mennonite bishop of the 17th century.
–noun
2.
the Amish people.
Origin: 1835–45, Americanism; < G amisch, after Jakob Ammann;see -ish1
A·mish (ä'mĭsh, ām'ĭsh) n.
(used with a pl. verb) An orthodox Anabaptist sect that separated from the Mennonites in the late 17th century and exists today primarily in Ohio and southeast Pennsylvania. adj. Of or relating to this sect or its members.
[German amisch, after Jacob Amman, 17th-century Swiss Mennonite bishop.]