breakthrough
1. [ noun ] making an important discovery
Related terms: discovery
2. [ noun ] (psychology) a productive insight
Synonyms: discovery find
Related terms: insight learn discover discover
3. [ noun ] (military) a penetration of an enemy's defense in depth and strength
Related terms: penetration break_through
Similar spelling:   break_through
  breeze_through
  bracket_out
  breast-high
  break_out
  breakwater
  break_with
  breaststroke