Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Latin: in the same place
Word Origin and History for ibid.
also ibid, 1660s, abbreviation of Latin ibidem "in the same place," from ibi "there," pronomial adverb of place, + demonstrative suffix -dem.
Online Etymology Dictionary, © 2010 Douglas Harper
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.