U

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U1 / yoō/ (also u) • n. (pl. Us or U's ) 1. the twenty-first letter of the alphabet. ∎  denoting the next after T in a set of items, categories, etc. 2. (U) a shape like that of a capital U, esp. a cross section: [in comb.] U-shaped glaciated valleys. U2 • symb. the chemical element uranium.U3 • adj. inf., chiefly Brit. (of language or social behavior) characteristic of or appropriate to the upper social classes: U manners.U4 / oō/ • n. a Burmese title of respect before a man's name, equivalent to Mr.: U Thien San.

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