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aha moment

American  

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 British  

noun

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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of aha moment

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

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.