horseback

American  

[hawrs-bak] / ˈhɔrsˌbæk /

noun

1. the back of a horse.

2. Geology. a low, natural ridge of sand or gravel; an esker.

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adverb

1. on horseback.

   to ride horseback.

adjective

1. made or given in a casual or speculative way; approximate or offhand.

   a horseback estimate on the construction costs.

horseback British  

/ ˈhɔːsˌbæk /

noun

1. 1. a horse's back (esp in the phrase on horseback )

   2. ( as modifier )

      horseback riding

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Etymology

Origin of horseback

1350–1400; Middle English. See horse, back ¹

Explanation

If you ride your trusty steed to school, you're traveling on horseback. Your arrival is going to make your classmates wish they had their own ponies! When horseback is used as a noun, it means "the back of a horse." It's more commonly used to describe someone who sits on a horse's back, a horseback rider, or as an adverb to describe that mode of transportation. Even if you're not experienced with horses, you may dream of one day going horseback riding on a beautiful beach!

Example Sentences

Some fought with only a trident; some fought mounted on horseback; some on chariot; others on foot with helmet and short sword; some with two daggers; still others exclusively fought wild beasts.

From The Wall Street Journal • Apr. 3, 2026

But the most stylish delegation in this global capital of fashion will be the one wearing a cashmere collection inspired by warriors on horseback, nomads in yurts and the strength of history’s most sprawling empire.

From The Wall Street Journal • Feb. 6, 2026

The national monument to the late Queen Elizabeth II will feature a statue of her standing, rather than on horseback as previously illustrated, the memorial committee has announced.

From BBC • Jan. 22, 2026

“Exquisite and tranquil lands perfect for hiking, horseback riding, snowshoeing, snowmobiling, and more,” the listing crowed.

From MarketWatch • Dec. 23, 2025

He hoped for an opportunity when Garfield left the grounds on horseback, in his carriage, or by foot.

From "Ambushed!" by Gail Jarrow