mustache//ˈmʌstæʃ//B1Frequency Level 10NeutralNounmustacheSingularmustachesPlural1Hair grown on the upper lip, typically by men.My father has a thick mustache.2A similar growth of hair or bristles around the mouth of some animals.The cat's mustache twitched as it sniffed the air.Synonymmoustachewhiskers
