You know what it looks like… but what is it called?
TAKE THE QUIZ“old order”
The following 3 entries include the term old order.
Old Order Amish
noun: a member of the Old Order Amish Mennonite Church adhering strictly to the older forms of worship and attire
Old Order Brethren
plural noun: yorker brethren
Old Order Dunkers
plural noun: old german baptist brethren
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Merriam-Webster unabridged