penguin

American  

[peng-gwin, pen-] / ˈpɛŋ gwɪn, ˈpɛn- /

noun

Ornithology.

penguins plural

1. any of several flightless, aquatic birds of the family Spheniscidae, of the Southern Hemisphere, having webbed feet and wings reduced to flippers.

2. Obsolete. great auk.

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penguin British  

/ ˈpɛŋɡwɪn /

noun

1. any flightless marine bird, such as Aptenodytes patagonica (king penguin) and Pygoscelis adeliae ( Adélie penguin ), of the order Sphenisciformes of cool southern, esp Antarctic, regions: they have wings modified as flippers, webbed feet, and feathers lacking barbs See also emperor penguin king penguin

2. an obsolete name for great auk

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Other Word Forms

Noun Inflected Forms

• penguins
  plural

Etymology

Origin of penguin

1570–80; origin uncertain; perhaps < Welsh pen gwyn literally, white head (referring to the great auk in its winter plumage); later misapplied to the Spheniscidae

Explanation

What's black and white and loves to eat seafood? A penguin! Penguins are flightless water birds, and the only place in the Northern Hemisphere where you'll find wild penguins is on the Galápagos Islands. If you live north of the equator, your interactions with penguins are limited to zoos and aquariums. Penguins are distinctive because of their contrasting black-and-white coloring, their size, and the fact that they walk and swim but don't fly. Their wings have, in fact, evolved to act as flippers in the water. You might think of penguins as cold-weather birds, and many do live in Antarctica, but most are found in more temperate areas.

Example Sentences

They also found higher than expected deaths in penguin populations.

From BBC • Jun. 18, 2026

In a statement released on Friday, Merlin Entertainments said the announcement came after "months of collaborative work with Freedom for Animals, the Born Free Foundation and PETA, a wild penguin researcher, a veterinarian, and BIAZA".

From BBC • May 29, 2026

Our new results have been found in a study of a particular kind of process, known as an electroweak penguin decay.

From Science Daily • May 26, 2026

But in L.A., none is so iconic as the giant looming penguin that signifies milkshakes, burgers, oldies playlists and sheer Americana at the end of the road.

From Los Angeles Times • May 12, 2026

The penguin jumped up onto a chair and from there onto the edge of the table, flapping his flippers again to recover his balance.

From "Mr. Popper's Penguins" by Florence Atwater and Richard Atwater