adjective Of or relating to any of several Eastern Christian churches that are in communion with the Roman Catholic Church but retain their own languages, rites, and codes of canon law.
noun A member of any of these churches.
Origin:
Origin: Russian uniyat
Origin: , from Polish uniat, the Union of Brest-Litovsk (1596)
Origin: , from unija, union
Origin: , from Late Latin ūniō; see union
.