Definition from Wiktionary, the free dictionary
- Very compact.
2007 May 3, Michel Marriott, “Small and Smaller”, New York Times:
- LONG among the hottest items in Europe and Asia, ultraportable notebook computers supercompact, lightweight laptops that slip into briefcases as easily as a legal pad appear to be finding favor with American tastes.
- (mathematics, topology, of a topological space) Having a subbasis such that every open cover of the topological space from elements of the subbasis has a subcover with at most two subbasis elements.
- (mathematics, set theory) Being a type of large cardinal with a variety of reflection properties.
- (very compact): ultracompact