Definitions:
closely and neatly packed together; dense

composed or made up of

exert force on (something) so that it becomes more dense; compress

a small flat case containing face powder, a mirror, and a powder puff.

something that is a small and conveniently shaped example of its kind, in particular a compact camera

a mass of powdered metal compacted together in preparation for sintering

a formal agreement or contract between two or more parties

make or enter into (a formal agreement) with another party or parties