aha moment

noun

Informal.

1. a point in time, event, or experience when one has a sudden insight or realization.

   My aha moment was when I put on my shorts from last summer and they didn’t fit.

aha moment

noun

1. an instant at which the solution to a problem becomes clear

Word History and Origins

Origin of aha moment¹

From the expression aha, used to signal sudden awareness or comprehension