srirachaPronunciation: /sɪˈrɑːtʃɑː/Definition of sriracha noun [mass noun] a spicy sauce made with red chilli and garlic, served especially with Vietnamese and Thai food:pho with a generous dose of srirachaOrigin:Thai, from the name of the city in which the sauce originatedsriracha in other Oxford dictionaries Definition of sriracha in the US English dictionary