(1):

(n.) The loose black particles collected from combustion, as on pots and kettles, or in a chimney; soot; smut; also, coloring matter which rubs off from cloth.

(2):

(v. t.) To lay up in a crock; as, to crock butter.

(3):

(n.) Any piece of crockery, especially of coarse earthenware; an earthen pot or pitcher.

(4):

(n.) A low stool.

(5):

(v. i.) To give off crock or smut.

(6):

(v. t.) To soil by contact, as with soot, or with the coloring matter of badly dyed cloth.