shadowboxed; shadowboxing; shadowboxes
Definition of shadowbox
(Entry 1 of 2)
: to box with an imaginary opponent especially as a form of training
shadow box
nounDefinition of shadow box (Entry 2 of 2)
: a shallow enclosing case usually with a glass front in which something is set for protection and display
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Merriam-Webster unabridged
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Time Traveler for shadowbox
The first known use of shadowbox was in 1891
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