Douglas Harper's Etymology Dictionary
also ibid, 1660s, abbreviation of Latin ibidem "in the same place," from ibi "there," pronomial adverb of place, + demonstrative suffix -dem.
Wiktionary
abbr. (context bibliography English) Abbreviation of ibidem, in the same place. Indicates a reference to the same source as the previous one.
WordNet
Wikipedia
Ibid. ( Latin, short for ibidem, meaning "in the same place") is the term used to provide an endnote or footnote citation or reference for a source that was cited in the preceding endnote or footnote. This is similar in meaning to idem (meaning something that has been mentioned previously; the same), abbreviated Id., which is commonly used in legal citation. To find the ibid. source, one must look at the reference preceding it.
Ibid. may also be used in the Harvard (name-date) system for in-text references where there has been a close previous citation from the same source material. The previous reference should be immediately visible, e.g. within the same paragraph or page. Many academic publishers now prefer that "ibid." should not be given in italics, as it is a commonly found term.
Notice that ibid. is an abbreviation where the last two letters of the word are not present; thus, it commonly takes a period (full stop) in both American and British usage, as do all abbreviations.
Usage examples of "ibid.".
CIA, ibid. 1991, THE YEAR OF MISSED OPPORTUNITIES During the fall of 1990, Saddam Hussein had badly miscalculated his chances of success because his key assumptions about a war with the U.
The two best books on the subject remain Makiya, ibid., and Makiya, Cruelty and Silence.
Pollack, ibid. The Conventional Threat A glance at the numerical balance of forces in the Persian Gulf region illustrates the most obvious dimension of the Iraqi military threat.
Duelfer, ibid. Biological Warfare Iraq began its biological warfare program in 1972.
Pope, ibid. The tanker trade in the Gulf is more variable, in large part because of the unpredictability of the Iranian government, which at times has responded to U.
Cordesman, ibid. It took some time for either the bombing or the loss of Pakistani support to have any material impact.
Conetta, ibid. THE KOSOVO EXPERIENCE The United States had a very different experience waging a massive air campaign during the Kosovo War of 1999, and this campaign has additional lessons for U.
On the inability of NATO air forces to do any significant harm to the Serbian ground forces, see Hosmer, ibid., pp.
Casey and Rivkin, ibid. In addition, the United States could employ the same legal justification it has used for previous military action against Iraq.
World War I bunker: ibid. The original listening post was set up in Key West in July 1961.
Drifting Station Alpha: Details on Station Alpha, and the quotations from Smith, come from ibid., pp.
NATO air forces to do any significant harm to the Serbian ground forces, see Hosmer, ibid., pp.