1. (sport) go through boxing motions without an opponent
   "The fighter shadowboxed to warm up before the match"

1. A shallow rectangular box with a transparent front used to protect and display small items (jewellery, coins, etc.)
   "The collector displayed his rare coins in a custom-made shadow box"

Derived forms: shadowboxing, shadowboxes, shadowboxed

Type of: box

Encyclopedia: Shadowbox