kəmˌpaktəfə̇ˈkāshən noun
( -s )
Etymology: compact (I) + -ification (as in saponification )
1. : a compact topological space that contains a given topological space as a subset or that contains a subset homeomorphic to the given topological space
2. : the application of a topological compactification to a model of the universe (as one involving superstrings) in which the ordinary dimensions of space are held to coexist with several other dimensions too infinitesimal in size to observe