Foul matter, like soot or coal dust; also, a spot or soil
made by such matter.

Bad, soft coal, containing much earthy matter, found in
the immediate locality of faults.

An affection of cereal grains producing a swelling which
is at length resolved into a powdery sooty mass. It is caused by
parasitic fungi of the genus Ustilago. Ustilago segetum, or U. Carbo,
is the commonest kind; that of Indian corn is Ustilago maydis.

To stain or mark with smut; to blacken with coal, soot, or
other dirty substance.

To taint with mildew, as grain.

To blacken; to sully or taint; to tarnish.

To clear of smut; as, to smut grain for the mill.

To gather smut; to be converted into smut; to become
smutted.

To give off smut; to crock.