e·ma·ci·ate (?-m??sh?-?t?)tr. & intr.v. e·ma·ci·at·ed, e·ma·ci·at·ing, e·ma·ci·ates To make or become extremely thin, especially as a result of starvation.[Latin ?maci?re, ?maci?t- : ?-, ex-, intensive pref.; see ex- + maci?re, to make thin; see m?k- in Indo-European roots.]e·ma?ci·a?tion n.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.