4. smut a disease of plants, esp. cereal grasses, characterized by the conversion of affected parts into black, powdery masses of spores, caused by fungi of the order Ustilaginales.
5. smut a fungus causing this disease.
6. (v.t.)smut to soil or smudge.
7. (v.i.)smut to become affected with smut, as a plant.
Etymology: (1580–90; akin to earlier smit (OE smitte), by assoc. with smudge , smutch)
Definition of 'smut'
Princeton's WordNet
1. (noun)carbon black, lampblack, soot, smut, crock a black colloidal substance consisting wholly or principally of amorphous carbon and used to make pigments and ink
2. (noun)smut destructive diseases of plants (especially cereal grasses) caused by fungi that produce black powdery masses of spores
3. (noun)smut, smut fungus any fungus of the order Ustilaginales
4. (noun)obscenity, smut, vulgarism, filth, dirty word an offensive or indecent word or phrase
5. (verb)pornography, porno, porn, erotica, smut creative activity (writing or pictures or films etc.) of no literary or artistic value other than to stimulate sexual desire
6. (verb)smut make obscene "This line in the play smuts the entire act"
7. (verb)smut stain with a dirty substance, such as soot
8. (verb)smut become affected with smut "the corn smutted and could not be eaten"
9. (verb)smut affect with smut or mildew, as of a crop such as corn
Definition of 'smut'
Webster Dictionary
1. (verb)smut foul matter, like soot or coal dust; also, a spot or soil made by such matter
2. (verb)smut bad, soft coal, containing much earthy matter, found in the immediate locality of faults
3. (verb)smut 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
Definitions of smut 
Afrikaans: vulgêre praatjies
Arabic: كلام بَذيء
Bulgarian: цинизъм
Brazilian: obscenidade
Czech: oplzlost
German: der Schmutz
Danish: smuds
Greek: αισχρολογίες, βωμολοχίες
Spanish: obscenidad
Estonian: labasus, rõvedus
Farsi: لكه
Finnish: törkypuhe
French: obscénité
Hebrew: נִיבּוּל-פֵּה
Hindi: अश्लील साहित्य इत्यादि
Croatian: prljavština, nepristojan 
Hungarian: trágárság
Indonesian: kejorokan
Icelandic: klám
Italian: oscenità
Japanese: みだらな話
Korean: 외설스런 말
Lithuanian: nešvankybės
Latvian: rupjība; piedauzība
Malay: kotor
Dutch: vuile taal
Norwegian: griseprat, grove historie
Polish: sprośność, świństwa
Persian: لكه
Pashto: توركى، توكر كې: تورداغ،خي
Portuguese: obscenidade
Romanian: obscenitate
Russian: непристойность, похабщина
Slovak: oplzlosť
Slovenian: nespodobnost
Serbian: vulgarnost
Swedish: oanständigt språk
Thai: สิ่งลามก
Turkish: müstehcen konuşma
Taiwanese: 淫穢語言
Ukrainian: непристойність
Urdu: فحش باتیں، تصاویر وغیرہ
Vietnamese: lời nói tục tĩu
Chinese: 淫秽语言
