plural seahorses

Definition of seahorse

1 : walrus
2 : a mythical creature half horse and half fish
3 : any of a genus (Hippocampus of the family Syngnathidae) of small bony fishes that have the head angled downward toward the body which is carried vertically and are equipped with a prehensile tail

Illustration of seahorse

Illustration of seahorse

seahorse 3

Examples of seahorse in a Sentence

Recent Examples on the Web The sea horse sculpture was replaced years ago with a cherub. Robert A. Cronkleton, kansascity, "Know that sad, empty fountain at Meyer Circle? Ward Parkway drivers, take heart," 11 Oct. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'seahorse.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of seahorse

15th century, in the meaning defined at sense 1

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The first known use of seahorse was in the 15th century

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Cite this Entry

“Seahorse.” Dictionary, Merriam-Webster, Accessed 24 Feb. 2020.

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More Definitions for seahorse

sea horse


Kids Definition of sea horse

: a small fish with a head which looks like the head of a horse

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