1. u - Noun
2. u - Adjective
3. u - Pronoun
4. u - Preposition
5. u - Adjective Satellite
6. U - Proper noun
7. u - Symbol
a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons
a base containing nitrogen that is found in RNA (but not in DNA) and derived from pyrimidine; pairs with adenine
(chiefly British) of or appropriate to the upper classes especially in language use
Source: WordNet