What is "to send packing"

Pack \Pack\, v. i.

1. To make up packs, bales, or bundles; to stow articles securely for transportation.

2. To admit of stowage, or of making up for transportation or storage; to become compressed or to settle together, so as to form a compact mass; as, the goods pack conveniently; wet snow packs well.

3. To gather in flocks or schools; as, the grouse or the perch begin to pack. [Eng.]

4. To depart in haste; -- generally with off or away.

   Poor Stella must pack off to town
   --Swift.

   You shall pack, And never more darken my doors again.
   --Tennyson.

5. To unite in bad measures; to confederate for ill purposes; to join in collusion. [Obs.] ``Go pack with him.''
   --Shak.

   To send packing, to drive away; to send off roughly or in disgrace; to dismiss unceremoniously. ``The parliament . . . presently sent him packing.''
   --South.