There are 2 main definitions of tuna in English:

tuna1

Line breaks: tuna
Pronunciation: /ˈtjuːnə
 
/

noun (plural same or tunas)

A large and active predatory schooling fish of warm seas, extensively fished commercially and popular as a game fish. See also tunny.
More example sentences
  • The aim is to reduce the incidental catch of gamefish like marlin while allowing stocks of swordfish, oceanic sharks and tuna to replenish themselves.
  • Tom Fitzgerald said fish landings were down on the previous year because of the ban on tuna drift net fishing and severe restrictions on quotas of other species.
  • As a rule, I avoid lumps of grilled tuna: it's fish for people who don't like eating fish, or just don't like eating.

Origin

late 19th century: from American Spanish, from Spanish atún 'tunny'.

Definition of tuna in:

There are 2 main definitions of tuna in English:

tuna2

Line breaks: tuna
Pronunciation: /ˈtjuːnə
 
/

noun

North American
1The edible fruit of a prickly pear cactus.
2A prickly pear cactus, widely cultivated in Mexico for its edible fruit.

Origin

mid 16th century: via Spanish from Taino.

Definition of tuna in: