- A large round fish of the genus Thunnus, especially Thunnus thynnus, weighing up to 600 kg and coming in various forms. The flesh looks almost like beef; some is light and lean and some dark and oily. Baked or grilled when fresh but most consumption in Europe is in canned form.
- noun marihuana. The reason for this usage is unclear; it may simply be a transference of the idea of tuna as a delicacy or staple food.
- noun a large edible sea fish with dark pink flesh