a name given (1) to the learned clergy who sat as advisers of the bishops in synods; (2) also to the residentiaries in a minister, as master of the lady chapel, being its keeper; master of the choristers, master of the common hall, califactory, or parlor; master of converts, the superintendent of lay- brothers; the master of the novices, always an elderly monk; master of the song-school; master of the shrine, masters of the order or custodes, the great officers of the monastery.