I. plural noun the members of a strict Mennonite sect founded by the Swiss preacher Jakob Amman (or Amen) ( c. 1645– c. 1730). Now living mainly in Pennsylvania and Ohio, the Amish migrated to North America from c. 1720. II. adjective relating to the Amish.
– origin mid 19th cent.: apparently from German amisch, from the name Jakob Amman.