mu
French, noun
mu is spelled M-U (2 letters) and appears 3.3 times per million words in written French, the 14,875th most frequent French word form (wordfreq, 2021 data). Mu is a French masculine noun meaning “mu (Greek letter)” (English Wiktionary, September 2026). With an accent, mû is a different word: “past participle of mouvoir”. The French Wiktionary (Wiktionnaire) defines it as “μ, Μ, douzième lettre et huitième consonne de l’alphabet grec”.
What does mu mean in English?
noun
- 1
masculinemu (Greek letter)
verb
- 1
post-1990 spelling of mû
verb
- 1
past participle of mouvoir
Source: English Wiktionary, French section, dump of September 2, 2026 (CC BY-SA 4.0).
How French dictionaries define it
noun: 1. μ, Μ, douzième lettre et huitième consonne de l’alphabet grec.
noun: 1. Synonyme de muon.
adverb: 1. Mot utilisé pour apporter une réponse dénégatoire. Il marque le désaccord avec les présupposés d’une question.
verb: 1. Variante orthographique de mû.
The definition in the French Wiktionary (Wiktionnaire), in French.
Source: French Wiktionary (Wiktionnaire), dump of September 1, 2026 (CC BY-SA 4.0), through kaikki.org.
Forms of mu
- mue feminine
- mus masculine plural
- mues feminine plural
- mu alternative
Source: English Wiktionary and French Wiktionary (Wiktionnaire) (dumps of September 2, 2026 and September 1, 2026).
English words that translate to mu
Source: the translation tables of the English Wiktionary, dump of September 2, 2026.
How common is mu in French?
mu appears 3.3 times per million words in written French.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).