1with object To cause (a church, congregation, group of worshippers, etc.) no longer to be considered to constitute a church. Now rare (chiefly historical).
2rare with object To exclude or expel (a person or group of people) from membership of a church; to excommunicate.
Early 17th century; earliest use found in Henry Ainsworth (1569–1622), separatist minister and religious controversialist. From dis- + church.