What is the meaning of I. e.?

Abbreviation of Latin id est, that is.
Webster's Revised Unabridged Dictionary
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APAWebster's. (2011). i. e.. Retrieved September 20, 2026, from http://smartdefine.org/i._e./definitions/2018555
ChicagoWebster's. 2011. "i. e." http://smartdefine.org/i._e./definitions/2018555 (accessed September 20, 2026).
HarvardWebster's 2011, i. e., Smart Define, viewed 20 September, 2026, <http://smartdefine.org/i._e./definitions/2018555>.
MLAWebster's. "i. e." 27 May 2011. Web. 20 September 2026. <http://smartdefine.org/i._e./definitions/2018555>