noun (1)
tu·​na | \ ˈtü-nə How to pronounce tuna (audio) , ˈtyü- How to pronounce tuna (audio) \
plural tuna or tunas

Definition of tuna

 (Entry 1 of 2)

1 : any of numerous large vigorous scombroid food and sport fishes (such as an albacore or a bluefin tuna)
2 : the flesh of a tuna especially when canned for use as food

called also tuna fish


noun (2)
tu·​na | \ ˈtü-nə How to pronounce tuna (audio) \

Definition of tuna (Entry 2 of 2)

1 : any of various flat-jointed prickly pears (genus Opuntia) especially : one (O. tuna) of tropical America
2 : the edible fruit of a tuna

First Known Use of tuna

Noun (1)

1881, in the meaning defined at sense 1

Noun (2)

circa 1555, in the meaning defined at sense 1

History and Etymology for tuna

Noun (1)

American Spanish, alteration of Spanish atún, modification of Arabic tūn, from Latin thunnus, from Greek thynnos

Noun (2)

Spanish, from Taino

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The first known use of tuna was circa 1555

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More Definitions for tuna


tu·​na | \ ˈtü-nə How to pronounce tuna (audio) , ˈtyü-\
plural tuna or tunas

Kids Definition of tuna

: a large sea fish caught for food and sport

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More from Merriam-Webster on tuna

Rhyming Dictionary: Words that rhyme with tuna

Spanish Central: Translation of tuna

Nglish: Translation of tuna for Spanish Speakers

Britannica.com: Encyclopedia article about tuna

Comments on tuna

What made you want to look up tuna? Please tell us where you read or heard it (including the quote, if possible).


to move with exaggerated bouncy motions

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