The Collaborative International Dictionary of English v.0.48:
Lay reader \Lay" read"er\ (Eccl.) A layman authorized to read parts of the public service of the church. [Webster 1913 Suppl.] Lay shaftWordNet (r) 3.0 (2006):
lay reader n 1: a layman who is authorized by the bishop to read parts of the service in an Anglican or Episcopal church