I. U¹ , u /juː/ (plural U’s, u’s) noun

1. [uncountable and countable] the 21st letter of the English alphabet

2. [singular, uncountable] British English used to describe a film that has been officially approved as suitable for people of any age ⇒ PG Synonym : G American English

3. [countable] British English a mark given to a student’s work to show that it is extremely bad
⇒ U-boat, U-turn

[TahlilGaran] Dictionary of Contemporary English ▲

II. U² pronoun written informal
a way of writing ‘you’, used especially in emails and text messages:
I love U!

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U. , U /juː/
American English informal an abbreviation of university:
Indiana U

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2U2
To You Too (chat)

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4U
For You

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U
Unsatisfactory 
Upper 
You

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U2
You Too

[TahlilGaran] Acronyms and Abbreviations Dictionary ▲