From Ancient Greek μῦ (mû).
mu (countable and uncountable, plural mus)
- The 12th letter of the Modern Greek alphabet.
From Japanese 無 (mu, “nothing, neither yes nor no”)
- (Zen Buddhism) Neither yes nor no.
- (Zen Buddhism) Nothingness; nonexistence; the illusory nature of reality.
From Mandarin 畝／亩 (mǔ)
mu (plural mu)
- A unit of surface area, currently equivalent to 666 and 2/3 meters squared.