n. | 1. | a productive insight. |
2. | a sudden change of situation, such as making an important discovery, that permits further rapid advances toward a goal. | |
3. | (Mil.) a penetration of an enemy's defense in depth and strength. |
Noun | 1. | ![]() |
2. | breakthrough - making an important discovery | |
3. | breakthrough - a penetration of a barrier such as an enemy's defense |