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

During one particularly active stretch last weekend, one post showed Trump riding horseback beside George Washington, next to a race car, with the White House in the background.

From Barron's • Jun. 8, 2026

Instead, assaults often involve two or three soldiers walking across a field or riding motorbikes, sometimes even on horseback or on bicycles.

From BBC • May 17, 2026

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

Later in the evening, police officers, some on horseback, moved in on a smaller group of demonstrators around the corner from the federal detention facility.

From Los Angeles Times • Mar. 29, 2026

The illustration is of a knight on horseback, like a knight from a fairy tale.

From "The Night Circus" by Erin Morgenstern