Real Dictionary

Mennonite
adjective: Mennonite means relating to the religious beliefs or practices of Mennonites.
countable noun: Mennonites are members of a Protestant sect within the Christian church who do not baptize their children and who are opposed to military service.

Mennonite in American English
a member of a Protestant denomination, Anabaptist in origins, founded in the Netherlands in the 16th cent.: Mennonites favor plain dress and oppose military service and the holding of public office
noun: a member of an evangelical Protestant sect, originating in Europe in the 16th century, that opposes infant baptism, practices baptism of believers only, restricts marriage to members of the denomination, opposes war and bearing arms, and is noted for simp

Mennonite in British English
noun: a member of a Protestant sect that rejects infant baptism, Church organization, and the doctrine of transubstantiation and in most cases refuses military service, public office, and the taking of oaths