hippo

¹ American  

[hip-oh] / ˈhɪp oʊ /

noun

Informal.

plural

hippos

1. hippopotamus.

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Hippo ² American  

[hip-oh] / ˈhɪp oʊ /

noun

1. Hippo Regius.

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hippo- ³ American  

1. a combining form appearing in loanwords from Greek, where it meant “horse” (hippodrome ); on this model, used in the formation of compound words (hippology ).

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hippo British  

/ ˈhɪpəʊ /

noun

1. short for hippopotamus

2. an armoured police car

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Etymology

Origin of hippo¹

By shortening

Origin of hippo-³

< Greek: combining form of híppos; cognate with Latin equus, Old Irish ech, Old English eoh, Sanskrit aśvas, Lithuanian ašvà

Explanation

A hippo is a very large African mammal that lives both in and out of the water. Adult hippos can weigh well over 3,000 pounds. Hippos are the third-largest land mammals (after elephants and rhinos), and of the three, they are by far the most aggressive and territorial. These gray, hairless, barrel-shaped animals resemble enormous pigs, but they're more closely related to whales and dolphins. Hippo is shorthand for hippopotamus, a word that derives from the Greek ho hippos potamios, "the horse of the river."

Example Sentences

Videos of the hippo went viral, memes were created, and visitor numbers at the zoo increased hugely as thousands flocked each weekend to catch a glimpse of Moo Deng.

From BBC • Apr. 8, 2026

Sotheby’s expected its Lalanne hippo copper bar cart to sell for up to $10 million last month.

From The Wall Street Journal • Dec. 17, 2025

Goat, hippo and duck-shaped hot air balloons floated in clear blue skies over war-ravaged Myanmar this week in a rare opportunity for escapism.

From Barron's • Nov. 1, 2025

"Therefore, we should re-analyze other continental European hippo fossils traditionally attributed to the last interglacial period."

From Science Daily • Oct. 26, 2025

It was much more frightening than any hippo.

From "My Life with the Chimpanzees" by Jane Goodall