bonitoPronunciation: /bəˈniːtəʊ/Definition of bonito noun (plural bonitos) a small tuna with dark oblique stripes on the back, important as a food and game fish. Sarda and related genera, family Scombridae: several species another term for skipjack (sense 1).Origin: late 16th century: from Spanishbonito in other Oxford dictionaries Definition of bonito in the US English dictionary