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[myoo, moo] /myu, mu/
the 12th letter of the Greek alphabet (M, μ).
the consonant sound represented by this letter.
micron (def 1).
Origin of mu
1895-1900; < Greek


[myoo, moo] /myu, mu/
a legendary lost continent supposed to have sunk into the SW Pacific Ocean at about the same time that Atlantis disappeared into the Atlantic Ocean. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for mu
Contemporary Examples
Historical Examples
  • We have met the value dumu or its dialectic equivalent umu, represented by U and mu (see on line 5).

    Sumerian Hymns Frederick Augustus Vanderburgh
  • It is the universal belief that prophets work miracles, (mu'jizt).

    The Faith of Islam Edward Sell
  • Patubagtúbag bisag dì makamau, mu rag si kurik, He knows-it-all, answers all the questions (as if he knew).

  • He sprec, onne he mid Godes herungum his mu gebysga, and mid sore andetnysse Godes mildheortnysse sec.

  • From time to time the strains of mu sic floated faintly from the end of the street—Alyoshka, most likely, playing his concertina.

  • Shaibns orders for her stay and for the general exodus were communicated to her by her son, The Khn, in what mu.

    The Bbur-nma in English Babur, Emperor of Hindustan
  • Then as om is to mu, so is el, to li; as the equation of three degrees doth shew.

    The Way To Geometry Peter Ramus
  • In this year hostilities began between Shh Isml afaw and mu.

    The Bbur-nma in English Babur, Emperor of Hindustan
  • All the sects except the Shfa'tes hold that the mu'takif must fast.

    The Faith of Islam Edward Sell
British Dictionary definitions for mu


the 12th letter in the Greek alphabet (Μ, μ), a consonant, transliterated as m




Musicians' Union
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
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mu in Medicine

mu (myōō, mōō)

Symbol μ The 12th letter of the Greek alphabet. adj.
Of, relating to, or being a polypeptide chain that is one of five types of heavy chains present in immunoglobins.

Mu abbr.
Mache unit

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Slang definitions & phrases for mu


Related Terms


The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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mu in Technology

(Greek letter).
1. /micro/ prefix denoting division by 10^6, e.g. mu m (micrometre, a millionth part of a metre). Sometimes written as a 'u', the ASCII character nearest in appearance.
2. /myoo/ In the theory of functions, mu x . E denotes the least value of x for which E = x, i.e. the least fixed point of the function \ x . E. The recursive function mu f . H f satisfies (and is defined by) the equation
mu f . H f = H (mu f . H f)
An alternative notation for the same function is
fix H = H (fix H)
See fixed point combinator.
3. multiple value.
[Jargon File]

1. The country code for Mauritius.
2. /moo/ The correct answer to the classic trick question "Have you stopped beating your wife yet?". Assuming that you have no wife or you have never beaten your wife, the answer "yes" is wrong because it implies that you used to beat your wife and then stopped, but "no" is worse because it suggests that you have one and are still beating her. According to various Discordians and Douglas Hofstadter the correct answer is usually "mu", a Japanese word alleged to mean "Your question cannot be answered because it depends on incorrect assumptions".
Hackers tend to be sensitive to logical inadequacies in language, and many have adopted this suggestion with enthusiasm. The word "mu" is actually from Chinese, meaning "nothing"; it is used in mainstream Japanese in that sense, but native speakers do not recognise the Discordian question-denying use. It almost certainly derives from overgeneralisation of the answer in the following well-known Rinzei Zen teaching riddle:
A monk asked Joshu, "Does a dog have the Buddha nature?" Joshu retorted, "Mu!"
See also has the X nature, AI Koan.
[Douglas Hofstadter, "Gödel, Escher, Bach: An Eternal Golden Braid"].
[Jargon File]

The Free On-line Dictionary of Computing, © Denis Howe 2010
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Related Abbreviations for mu


multiple unit
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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