I. ˈyü noun
( plural u's or us ˈyüz)
Usage: often capitalized, often attributive
1.
a. : the 21st letter of the English alphabet
b. : an instance of this letter printed, written, or otherwise represented
c. : a speech counterpart of orthographic u (as long u in mute, short u in cut, or u in rule )
2. : a printer's type, a stamp, or some other instrument for reproducing the letter u
3. : someone or something arbitrarily or conveniently designated u especially as the 20th or when j is used for the 10th the 21st in order or class
4. : something having the shape of the letter U
II. abbreviation
Usage: often capitalized
1. uncirculated
2. uncle
3.
[German und ]
and
4. under
5. unified
6. uniform
7. union; unionist
8. unit; united
9. universal
10. university
11. unpleasant
12. upper
III. symbol
Usage: capitalized
1. ital intrinsic energy
2. uranium
IV. ˈyü adjective
Usage: usually capitalized
Etymology: u pper class
: characteristic of the upper classes — usually used in contrast to non-U
V. abbreviation
Usage: capitalized
uracil