1. an important discovery or development that removes a barrier to progress
2. the act of forcing a way through a barrier or defense
Usage: military

1. characterized by removing barriers to progress; innovative

Examples

• The new vaccine represents a major breakthrough in cancer treatment.
• Scientists announced a breakthrough in renewable energy technology.
• The team’s breakthrough came after months of research.
• Enemy forces achieved a breakthrough along the eastern front.
• Her breakthrough performance earned her an Oscar nomination.
• The breakthrough drug could help millions of patients worldwide.
• This breakthrough innovation will change how we communicate.