Compact

Compact as a general noun can refer to: Template:Wiktionary

• 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.