Pronunciation IPA (key): /ˈɜː(r)θˌwɜː(r)m/ Audio (US)(file) Hyphenation: earth‧worm Noun Singular earthworm Plural earthworms (countable) An earthworm is a type of worm that lives in the ground. When it was raining, the earthworms came out. Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads