spaghettini Syllabification: (spa·ghet·ti·ni)Pronunciation: /ˌspagəˈtēnē/Definition of spaghettini noun pasta in the form of strings of thin spaghetti. Origin:Italian, diminutive of spaghetti 'little strings' (see spaghetti)spaghettini in other Oxford dictionaries Definition of spaghettini in the British & World English dictionary