(1):

(n.) A thin, coarse mortar, used for pouring into the joints of masonry and brickwork; also, a finer material, used in finishing the best ceilings. Gwilt.

(2):

(n.) Lees; dregs; grounds.

(3):

(n.) Coarse meal; ground malt; pl. groats.

(4):

(n.) Formerly, a kind of beer or ale.

(5):

(v. t.) To fill up or finish with grout, as the joints between stones.