'Unbox' definitions:

Definition of 'unbox'

(from WordNet)
verb
Remove from a box; "unbox the presents" [ant: box, package]

Definition of 'Unbox'

From: GCIDE
  • Unbox \Un*box"\, v. t. [1st pref. un- + box.] To remove from a box or boxes. [1913 Webster]