Third-person singular simple present indicative form of shadowbox.(verb)
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Use "shadowboxes" in a sentence
"I don't know what your plans are for the returned awards, but many of us display military awards in shadowboxes, which are available from stores that sell stuff to military people, like Ranger Joe's and the US Cavalry Store."
"Ari writes about Victorian shadowboxes for a class assignment on page 110."
"She's not a fighter -- she's a capitulator who shadowboxes."