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• hippo
  hippo

  noun

  hippopotamus.
• Hippo
  Hippo

  noun

  Hippo Regius.
• hippo-
  hippo-

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

hippo

¹ American  

[hip-oh] / ˈhɪp oʊ /

noun

Informal.

hippos plural

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

In northeastern Annaba -- formerly the ancient Roman city of Hippo -- Leo will visit vestiges of the city's historical past, as well as a reception centre run by Catholic nuns for impoverished elderly people.

From Barron's • Apr. 14, 2026

In December, he expressed his desire to visit the continent, citing Algeria, the birthplace of St Augustine of Hippo, as a potential destination.

From BBC • Feb. 25, 2026

He abandoned his secular ambitions, returned to Africa and became the bishop of the city of Hippo Regius.

From The Wall Street Journal • Dec. 19, 2025

Dug’s head is so massive that, with the rest of his body mostly underwater, he resembled a blond, furry Hippo cutting through the water’s surface.

From Los Angeles Times • Jul. 21, 2025

He was made Bishop of Hippo, and was one of the most famous bishops the world has ever known.

From In God's Garden Stories of the Saints for Little Children by Steedman, Amy