don

verb1

1. •
   to put on something to wear, such as a coat or a hat

   • To don one's clothes.

noun5

1. •
   A (usually Spanish or Italian) title of respect to a man, especially a lord or nobleman.

   • Wo often of an evening go and hear the band in the square opposite the captin-giniral’s palace—it is here were the dons and donnas and all the fashionables assemble, and I must say it’s amusing. — 1845
2. •
   A mafia boss, especially one who is Italian or Italian-American.
3. •
   (UK) A university professor, particularly one at Oxford or Cambridge.

   • No one feeds at the high table except the dons and the gentlemen-commoners, who are undergraduates in velvet caps and silk gowns[.] — 1859
4. •
   (slang) Any man, bloke, dude.

   • I’m confused like who’s this don .22 bells and that who’s on — 2017
5. •
   (Canada) An employee of a university residence who lives among the student residents.

noun2

1. •
   dissolved organic nitrogen
2. •
   Abbreviation of deoxynivalenol, a toxic byproduct of Fusarium head blight of barley.

noun1

1. •
   A river, the fifth-longest in Europe, in Tula, Lipetsk, Voronezh, Volgograd and Rostov Oblasts, Russia, flowing 1160 miles to the Sea of Azov.