Word parts stop + -er Pronunciation (UK) IPA (key): /ˈstɒp.ə/ (US) IPA (key): /ˈstɑ.pɚ/ (AU) IPA (key): /ˈstɔp.ə/ Audio (AU)(file) Noun Singular stopper Plural stoppers (countable) A stopper is someone or something that stops things. Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads