tu ‧ na /ˈtjuːnə $ ˈtuːnə/ BrE AmE noun ( plural tuna )
[ Date: 1800-1900 ; Language: American Spanish ; Origin: Spanish atun , from Arabic tun , from Latin thunnus , from Greek thynnos ]
1 . [countable] a large sea fish caught for food
2 . [uncountable] ( also tuna fish ) the flesh of this fish, usually sold cooked in ↑ tin s