say it: MUH-stash
mustache is a noun meaning "an unshaved growth of hair on the upper lip". It is pronounced /ˈmʌˌstæʃ/ — MUH-stash. It carries one recorded sense.
an unshaved growth of hair on the upper lip
“he looked younger after he shaved off his mustache”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for mustache come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.