Pronunciation IPA (key): /bɔːlz/ Audio (UK)(file) Audio (US)(file) Audio (US)(file) Audio (US)(file) Noun Singular ball Plural balls The plural form of ball; more than one (kind of) ball. She likes to play with balls. (slang) Another word for the testicles. He got hit in the balls. (slang) Another word for someone who is brave. He must have a lot of balls to about his boss that way.Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads