miso Syllabification: (mi·so)Pronunciation: /ˈmēsō/Definition of miso noun 1paste made from fermented soybeans and barley or rice malt, used in Japanese cooking. 2 (also miso soup) a soup seasoned with miso paste, often with added tofu or vegetables: a bowl of piping hot misoOrigin:Japanesemiso in other Oxford dictionaries Definition of miso in the British & World English dictionary