u 1 or U 
(y)
(y)n. pl. u's or U's also us or Us
1. The 21st letter of the modern English alphabet.
2. Any of the speech sounds represented by the letter u.
3. The 21st in a series.
4. Something shaped like the letter U.
5. U A grade that indicates an unsatisfactory status.
passport, United States of AmericaThis stylized font appears on the first page of US passports.