shadow box

noun
  1. a shallow, rectangular frame fronted with a glass panel, used to show and at the same time protect items on display, as paintings, coins, or jewelry.

Origin of shadow box

First recorded in 1905–10
Also called shadow box frame.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for shadow-box

shadow-box

verb (intr)
  1. boxing to practise blows and footwork against an imaginary opponent
  2. to act or speak unconvincingly, without saying what one means, etche's just shadow-boxing
Derived Formsshadow-boxing, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for shadow-box
n.

protective display case, 1892, from shadow (n.) + box (n.1).

Online Etymology Dictionary, © 2010 Douglas Harper