Definition of smut

• v. t. - Foul matter, like soot or coal dust; also, a spot or soil made by such matter.
• v. t. - Bad, soft coal, containing much earthy matter, found in the immediate locality of faults.
• v. t. - 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.
• v. t. - Obscene language; ribaldry; obscenity.
• v. t. - To stain or mark with smut; to blacken with coal, soot, or other dirty substance.
• v. t. - To taint with mildew, as grain.
• v. t. - To blacken; to sully or taint; to tarnish.
• v. t. - To clear of smut; as, to smut grain for the mill.
• v. i. - To gather smut; to be converted into smut; to become smutted.
• v. i. - To give off smut; to crock.