abbreviation for (in annotations, bibliographies, etc, when referring to a book, article, chapter, or page previously cited)
- ibidem
also ibid, 1660s, abbreviation of Latin ibidem “in the same place,” from ibi “there,” pronomial adverb of place, + demonstrative suffix -dem.
An abbreviation for ibidem, a Latin word meaning “in the same place.” It is used in footnotes and bibliographies to refer to a source cited in a previous entry.