The Collaborative International Dictionary of English v.0.48:
Unpack \Un*pack"\, v. t. [1st pref. un- + pack.] [1913 Webster] 1. To separate and remove, as things packed; to open and remove the contents of; as, to unpack a trunk. [1913 Webster] 2. To relieve of a pack or burden. [R.] --Shak. [1913 Webster]WordNet (r) 3.0 (2006):
unpack v 1: remove from its packing; "unpack the presents" [syn: unpack, take out] [ant: pack]