A member of the International Organization of Good Templars (originally the Independent Order of Good Templars), an organization promoting temperance or total abstinence from alcohol.
Origin
Mid 19th century. From good + Templar.
Definition of Good Templar in US English:
Good Templar
nounˌɡʊd ˈtɛmplə
A member of the International Organization of Good Templars (originally the Independent Order of Good Templars), an organization promoting temperance or total abstinence from alcohol.