| yu | |
| —the internet domain name for | |
| Yugoslavia | |
| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
| YU | |
| —abbreviation for | |
| the former Union of Serbia and Montenegro | |
| [from Yugoslavia] | |
| YU Yugoslavia (international vehicle ID) |