1. verb; To box (fight) with one's shadow.
2.noun; A shallow, framed, rectangular box usually with a glass front that is used for holding and protecting items on display.
1. Because it was a very sunny day, the children went outside to play. Most began a game of kickball, but little Billy decided to shadow box, and started to throw punches at his shadow.
2. Kate made a shadow box for her desk by placing pictures, ticket stubs, cards, and such in a glass frame.