U

1

or u

[ yoo ]
/ yu /

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.

QUIZZES

IS YOUR DESERT PLANT KNOWLEDGE SUCCULENT OR DRIED UP?

Cactus aficionados, don't get left in the dust with this quiz on desert plants. Find out if you have the knowledge to survive this prickly foray into the desert!
Question 1 of 7
This tall, horizontally branched cactus is probably the most recognizable cactus in Arizona. What is it called?

Definition for U (2 of 9)

U2
[ yoo ]
/ yu /

pronoun Pronunciation Spelling.

you: Shoes Fixed While U Wait.

Definition for U (3 of 9)

U3
[ yoo ]
/ yu /

adjective Informal.

characteristic of or appropriate to the upper class, especially of Great Britain.

Origin of U

3
u(pper class)

Definition for U (4 of 9)

U4
[ oo ]
/ u /

noun

a Burmese title of respect applicable to a man: used before the proper name.

Definition for U (5 of 9)

U5

Symbol.

(on a packaged product) certified as kosher by the Union of Orthodox Hebrew Congregations.
the 21st in order or in a series, or, when I is omitted, the 20th.
Chemistry. uranium.
Biochemistry. uracil.
Thermodynamics. internal energy.
British. a designation for motion pictures determined as being acceptable for viewing by all age groups.Compare A3 (def. 10), X3 (def. 9).

Definition for U (6 of 9)

u.1

and.

Origin of u.

1
From the German word und

Definition for U (7 of 9)

u.2

uniform.
unit.
unsatisfactory.
upper.

Definition for U (8 of 9)

U.1

and.

Origin of U.

1
From the German word und

Definition for U (9 of 9)

U.2

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for U

British Dictionary definitions for U (1 of 4)

u

U

/ (juː) /

noun plural u's, U's or Us

the 21st letter and fifth vowel of the modern English alphabet
any of several speech sounds represented by this letter, in English as in mute, cut, hurt, sure, pull, or minus
  1. something shaped like a U
  2. (in combination)a U-bolt; a U-turn

British Dictionary definitions for U (2 of 4)

U1

symbol for

abbreviation for

text messaging you

adjective

British old-fashioned, informal (esp of language habits) characteristic of or appropriate to the upper classCompare non-U

British Dictionary definitions for U (3 of 4)

U2
/ () /

noun

a Burmese title of respect for men, equivalent to Mr

British Dictionary definitions for U (4 of 4)

U.

abbreviation for

maths union
unit
united
university
upper
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for U

U

The symbol for the elementuranium
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for U

U

Abbreviation of uracil
The symbol for uranium.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.