katsuobushi Syllabification: (kat·suo·bu·shi)Pronunciation: /ˌkätswōˈbo͝oSHē, -ˈbo͞o-/Definition of katsuobushi noun dried fish prepared in hard blocks from the skipjack tuna and used in Japanese cooking. Origin:Japanesekatsuobushi in other Oxford dictionaries Definition of katsuobushi in the British & World English dictionary