Compact Compact Congruence (geometry) Category="Mathematical disambiguation"Compact as a general noun can refer to:

a diplomatic Contract or Covenant among parties, sometimes known as a Pact, Treaty, or an Interstate compact;
a newspaper format, in Britain;
A small, typically round case, usually containing one, two or all of the following: a Mirror, pressed powder, and/or a powder puff

In Mathematics, it can refer to various concepts:

Mostly commonly the term in Topology deals with compact spaces and compact sets;
In propositional and Predicate calculus it can refer to the Compactness theorem; and
In Order theory and Domain theory, the not entirely unrelated notion of a Compact element is typically used.

Compact is also the name of a 1960s British soap opera.