The Simple English Wikipedia has an article on: Underwear Pronunciation (US) IPA (key): /ˈʌndɚwɛr/ (UK) IPA (key): /ˈʌndəwɛə/ Audio (US)(file) Noun Singular underwear Plural none Underwear is a piece of clothing that you wear under your clothes next to your skin. I got out of the shower, dried myself, and put on some underwear. Wikimedia Commons has media related to: Underwear Wikiwand - on Seamless Wikipedia browsing. On steroids.