Meanings
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Thesaurus
Simplified etymology
Ditto comes from a Tuscan dialect form of Italian detto, “said,” itself from Latin dictus. In 17th-century Italian it was used in the expression meaning “in the aforesaid month,” and English merchants adopted it in accounts and lists to indicate that an item should be repeated. By the later 18th century, clothiers and tailors also used it to mean “the same material.”
Etymology
From regional Italian ditto, a variant of detto, 'said,' the past participle of dire, from Latin dicere, 'to say.' English merchants adopted it in account books to mean 'the aforesaid' and avoid repeating an entry. The agreement interjection and broader 'same' uses developed from that shorthand.