Definition of mu
: the 12th letter of the Greek alphabet — see alphabet table
Recent Examples of mu from the Web
The nitpicking audio press, which favors tower speakers and 50-pound pre-amps over Wi-Fi antennae and digital-filtering algorithms, has already lavished the mu-so with enough praise to make industry execs nervous.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'mu'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of mu
First Known Use: 13th century
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