eureka moment

noun
UK /jʊˈriːkə ˈməʊmənt/
US /jʊˈriːkə ˈmoʊmənt/

A eureka moment is the exciting time when you suddenly understand something or get a great idea.

She had a eureka moment in the bath and finally solved the puzzle.


OTHER MEANINGS

2. A sudden solution to a difficult problem.

The scientist's eureka moment came after months of failed tests.

3. A moment of sudden clarity about a personal truth.

He had a eureka moment and realized he wanted to be a teacher.

4. An unexpected moment of understanding during a lesson.

The class had a eureka moment when the teacher showed the trick.