UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/mjuː/US:USA pronunciation: respellingUSA pronunciation: respelling(myo̅o̅, mo̅o̅)

WordReference Random House Unabridged Dictionary of American English © 2020
mu  (myo̅o̅, mo̅o̅),USA pronunciation n. 
  1. Linguisticsthe 12th letter of the Greek alphabet (M, μ).
  2. Linguisticsthe consonant sound represented by this letter.
  3. Weights and Measuresmicron (def. 1).
  • Greek
  • 1895–1900

Mu  (myo̅o̅, mo̅o̅),USA pronunciation n. 
  1. Ancient History, Mythologya legendary lost continent supposed to have sunk into the SW Pacific Ocean at about the same time that Atlantis disappeared into the Atlantic Ocean.

Collins Concise English Dictionary © HarperCollins Publishers::
mu /mjuː/ n
  1. the 12th letter in the Greek alphabet (Μ, μ), a consonant, transliterated as m
'mu' also found in these entries:

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