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intr.v. sha·dow·boxed, sha·dow·box·ing, sha·dow·box·es
To spar with an imaginary opponent, as for exercise or training purposes.
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 rectangular frame fronted with a glass panel, used to show and protect items on display.
to go through the motions of boxing, without an opponent, as a training or conditioning procedure.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.