1. n. (also u) (pl. Us or U's)
1. the twenty-first letter of the alphabet.
2 a U-shaped object or curve (esp. in comb.: U-bolt).2. adj. esp. Brit. colloq.
1. upper class.
2 supposedly characteristic of the upper class.
Etymology: abbr. 3. adj. a Burmese title of respect before a man's name.
Etymology: Burmese 4. abbr. (also U.)
1. Brit. universal (of films classified as suitable without restriction).
2 university. 5.
symb. Chem. the element uranium.