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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.
Origin
from the expression aha, used to signal sudden awareness or comprehension
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for aha moment

aha moment

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
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Contemporary definitions for aha moment
noun

a sudden understanding, recognition, or resolution; also called [aha reaction]

Examples

Once she had that aha moment, she knew how to proceed.

Word Origin

1939

Dictionary.com's 21st Century Lexicon
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Word Value for aha

6
5
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