ItalianThat's right: the history of the word ditto starts with Italian: some early 17th century English speakers noticed that in Italian, ditto or detto was used to refer to a thing mentioned previously. English Language Learners Definition of ditto. It comes from Italian ditto, a dialect variation on detto, meaning “said," the. 3 days ago · ditto definition: 1. 'Ditto' comes from Latin, and means about 'as has been said before'. What is the definition of ditto? What is the meaning of ditto? How do you use ditto in a sentence?.