← BackshareGuessunderclothes/ˈʌndərˌkloʊðz/nounClothing worn next to the skin under outer garments, such as underwear.She packed extra underclothes for the long trip.He changed his underclothes after the workout.The store sells a variety of underclothes for men and women.SynonymsunderwearlingerieAntonymsouterwear