Definition of "kitchin"

There is a fountaine of hot burning water with the which they heate the Church of the Monastery and the Fryers chambers, it commeth also into the kitchin so boyling hot, that they vse no other fire to dresse their meate: and putting their breade into brasse pots without any water, it doth bake as it were in an hot ouen.

1598, Richard Hakluyt, The Principal Navigations, Voyages, Traffiques, and Discoveries of The English Nation, Vol. XII., America, Part I.‎

From that he led me to their kitchin; wheir ware 3 spits full of meat rosting (sometymes they have 7 when the Colledge is full).

1665-1676, Sir John Lauder, Publications of the Scottish History Society, Vol. 36‎