Definition of "mayster"

At Chrystes death, whan the Apostles all / Theyr mayster dyd leaue, throughe mutabylytie / Men were founde lyght, and trundlynge as a ball / In them was no fayth, but infydelytye

1542, Robert Burdet, “The Fawcon”, in A Dyalogue Defensyve for Women, London: Rycharde Banckes

My maysters, ich am an old man, and halfe blinde, […]

1561, John Awdelay, The fraternitye of vacabondes

Pilot […] / Vpon his card and compas firmes his eye, / The mayſters of his long experiment, / And to them does the ſteddy helme apply […].

1590, Edmund Spenser, “Book II, Canto VII”, in The Faerie Queene. […], London: […] [John Wolfe] for William Ponsonbie, page 271