Smut

1. v. t. Obscene language; ribaldry; obscenity.
2. v. t. Foul matter, like soot or coal dust; also, a spot or soil made by such matter.
3. v. t. Bad, soft coal, containing much earthy matter, found in the immediate locality of faults.
4. 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.
5. v. t. To clear of smut; as, to smut grain for the mill.
6. v. i. To gather smut; to be converted into smut; to become smutted.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.