- that is.
Origin of i.e.
From the Latin word id est
- Industrial Engineer.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- id est
Latin: that is (to say); in other words
Word Origin and History for i.e.
abbreviation of Latin id est, literally "that is;" used in English in the sense of "that is to say."
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.