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Definition of mu

mu

/mjuː/
mu

Plural:mus
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• noun

1

The twelfth letter of the Greek alphabet (Μ, μ), transliterated as 'm'.

Example

"In the ancient inscription, the Greek letter mu was carved with symmetrical vertical strokes."


2

A symbol (μ) used in science, statistics, and mathematics to represent the prefix micro- (one millionth), the population mean, or the coefficient of friction.

Example

"In statistical notation, the symbol mu represents the true mean of the entire population."


3

A traditional Chinese unit of land area, standardized in modern China as one-fifteenth of a hectare (approximately 666.7 square meters or 0.165 acres).

Example

"The agricultural cooperative cultivated thirty mu of terraced rice paddies along the hillside."


4

A concept in Zen Buddhism meaning 'nothingness' or 'neither yes nor no', used especially in response to a question whose underlying premises are false or dualistic.

Example

"The monk replied with 'mu' to indicate that the student's question relied on a false dichotomy."

• Rhymes for mu

Word Origin & Etymology

Borrowed from Ancient Greek μῦ (mû), which was adapted from the Phoenician letter mem (meaning 'water'). In its Chinese land-unit sense, it derives from Mandarin 畝 (mǔ).

Cite this Entry


Wordmom. (2026). Definition of Mu. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/mu
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