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1. Containing caffeine: caffeinated beverages.
2. Stimulated with or as if with caffeine: "She has taken an indignant high road, her manner edgy, caffeinated" (Carol Anshaw).
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.
a. with no natural caffeine removed
b. with added caffeine
2. highly stimulated by caffeine
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
caf•fein•at•ed(ˈkæf əˌneɪ tɪd)
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.