A moustache (UK: /məˈstɑːʃ/; mustache, US: /ˈmʌstæʃ/)[1] is a growth of facial hair grown above the upper lip and under the nose. Moustaches have been worn in various styles throughout history.[2]
^moustache is almost universal in British English while mustache is common in American English, although the third edition of Webster (1961), which gives moustache as the principal headword spelling. Later editions of Webster's New Collegiate Dictionary (from the 1973 eighth edition) give mustache.