Noun

1. The action of the verb.
   1. The action of putting things together, especially of putting clothes into a suitcase for a journey.
   2. The spatial arrangement of objects, items or constituent parts.
   3. The gathering of birds, animals etc. into a pack.
   4. The forming of players into a scrum.
2. As a concrete noun.
   1. Material used to fill in the space around something, especially to make a piston etc. watertight or airtight.
   2. Material used to wrap a product for sale etc.; packaging.
   3. A fee charged to cover the costs of packaging.