1. noun /ˈkɒmpækt,kəmˈpækt,ˈkʌmpækt,kəmˈpækt/
a) An agreement or contract.
b) A small folding mirror containing powder that fits into a womans purse or handbag.
2. adjective /ˈkɒmpækt,kəmˈpækt,ˈkʌmpækt,kəmˈpækt/
a) Closely packed, i.e. packing much in a small space.
A set S of real numbers is called compact if every sequence in S has a subsequence that converges to an element again contained in S.
b) Having all necessary features fitting neatly into a small space.
3. verb /ˈkɒmpækt,kəmˈpækt,ˈkʌmpækt,kəmˈpækt/
To make more dense; to compress.
Wikipedia foundation.