Definition of "maltster"

the Maltſter will ſtir his Barley Couches till the Sprit begins to fork , five or ſix times a day or more ; it being always his Care to keep them from drying too much on the outſides

1707, J[ohn] Mortimer, The Whole Art of Husbandry; or, The Way of Managing and Improving of Land. […], 2nd edition, London: […] J[ohn] H[umphreys] for H[enry] Mortlock […], and J[onathan] Robinson […], published 1708

The maltster, after having lain down in his clothes for a few hours, was now sitting beside a three-legged table, breakfasting off bread and bacon.

1874, Thomas Hardy, Far From the Madding Crowd