U, u

noun, plural U's or Us, u's or us.
the 21st letter of the English alphabet, a vowel.
any spoken sound represented by the letter U or u, as in music, rule, curious, put, or jug.
something having the shape of a U .
a written or printed representation of the letter U or u.
a device, as a printer's type, for reproducing the letter U or u.
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a Burmese title of respect applicable to a man: used before the proper name.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
u or U (juː)
n , pl u's, U's, Us
1.  the 21st letter and fifth vowel of the modern English alphabet
2.  any of several speech sounds represented by this letter, in English as in mute, cut, hurt, sure, pull, or minus
3.  a.  something shaped like a U
 b.  (in combination): a U-bolt; a U-turn
U or U

symbol for
1.  united
2.  unionist
3.  university
4.  in Britain
 a.  universal (used to describe a category of film certified as suitable for viewing by anyone)
 b.  (as modifier): a U film
5.  chem uranium
6.  biochem uracil
abbreviation for
7.  text messaging you
8.  old-fashioned, informal (Brit) Compare non-U (esp of language habits) characteristic of or appropriate to the upper class

U2 (uː)
a Burmese title of respect for men, equivalent to Mr

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

for historical evolution, see V. Used punningly for you by 1588 ["Love's Labour's Lost," V.i.60], not long after the pronunciation shift that made the vowel a homonym of the pronoun. As a simple shorthand (without intentional word-play), it is recorded
from 1862. Common in business abbreviations since 1923 (e.g. U-Haul, attested from 1951).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

U 3

The symbol for the element uranium.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
  1. Abbreviation of uracil

  2. The symbol for uranium.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Abbreviations & Acronyms
up quark
  1. internal energy

  2. [residential] unit

  3. units

  4. uracil

  5. uranium

  6. you

The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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