The twenty-first letter of the English alphabet, called u and written in the Latin script.

(stenoscript) (a) an initial letter ⟨u⟩

The name of the Latin-script letter U. / A thing in the shape of the letter U

(abbreviation, slang, text messaging, Internet) you (in text messaging and internet conversations)

Abbreviation of underwater.

plural of u (“the letter u”)

plural of U / plural of the letter u

The twenty-first letter of the English alphabet, called u and written in the Latin script. / A U-turn ('turned a U in the road')

A U-turn. / Abbreviation of university. / Abbreviation of Sunday.

(comparable, chiefly Britain, dated) Abbreviation of upper class (“characteristic of the upper classes, particularly in the use of language”). / (not comparable) Abbreviation of united.