Pronunciation enPR: pĕng'gwĭn or pĕn'gwĭn, IPA (key): /ˈpɛŋɡwɪn/ Audio (US)(file) Noun Singular penguin Plural penguins (countable) A penguin is a sea bird that cannot fly. We went to the Zoo to see the penguins. The Simple English Wikipedia has an article on: Penguin Wikimedia Commons has media related to: Penguin Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads