say it: TOO-nuh
tuna is a noun meaning "tropical American prickly pear of Jamaica". It carries 4 recorded senses.
tropical American prickly pear of Jamaica
important warm-water fatty fish of the genus Thunnus of the family Scombridae; usually served as steaks
New Zealand eel
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for tuna come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.