breakthrough
NounWordNet 3.0
Webster's Dictionary (GCIDE)
breakthrough \break"through`\ n.
1.a productive insight.
Syn: discovery, find. [WordNet 1.5]
2.a sudden change of situation, such as making an important discovery, that permits further rapid advances toward a goal. [WordNet 1.5 +PJC]
3.(Mil.) a penetration of an enemy's defense in depth and strength. [WordNet 1.5] Breakup