"tunas" in the noun sense

1. tuna, Opuntia tuna

tropical American prickly pear of Jamaica

2. tuna, tuna fish, tunny

important warm-water fatty fish of the genus Thunnus of the family Scombridae usually served as steaks

3. tuna, tunny

any very large marine food and game fish of the genus Thunnus related to mackerel chiefly of warm waters

4. tuna, Anguilla sucklandii

New Zealand eel

Source: WordNet® (An amazing lexical database of English)

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