shadowbox

Short definition from Wiktionary

Noun

1. 1
   A diorama or shallow display case, usually with a glass front.
2. 2
   A rectangular display area that is set off with a frame or drop shadow.
3. 3
   A box with a light inside used for reading X-ray images.
4. 4
   A shade that surrounds a lit display or screen to make it easier to read in bright environments.

Verb

1. 1
   To display in a shadowbox.
2. 2
   To practice moves without an actual opponent, often in front of a mirror.
3. 3
   To engage in evasive maneuvers; to avoid addressing something directly.
4. 4
   To argue with an imaginary enemy.