[ uhl-tuh-moh ]
/ ˈʌl təˌmoʊ /


in or of the month preceding the current one: on the 12th ultimo. Abbreviation: ult., ulto.Compare instant(def 11), proximo.

Origin of ultimo

1575–85; < Latin ultimō (mēnse or diē) in the last (month) or on the last (day)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for ultimo


/ (ˈʌltɪˌməʊ) /


(esp abbreviated in formal correspondence) in or during the previous montha letter of the 7th ultimo Abbreviation: ult. Compare instant (def. 7), proximo

Word Origin for ultimo

C16: from Latin ultimō on the last
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for ultimo


"in the month preceding the present," 1610s, common in abbreviated form ult. in 18c.-19c. correspondence and newspapers, from Latin ultimo (mense) "of last (month)," ablative singular masc. of ultimus "last" (see ultimate). Earlier it was used in the sense of "on the last day of the month specified" (1580s). Contrasted with proximo "in the next (month)," from Latin proximo (mense).

Online Etymology Dictionary, © 2010 Douglas Harper