verb (used without object)
  1. to make the motions of attack and defense, as in boxing, as a training or conditioning procedure.
  2. to evade or avoid direct or decisive action.

Origin of shadowbox

First recorded in 1915–20; shadow + box2 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for shadowbox

Contemporary Examples of shadowbox