yay

yay

1 [yey]
interjection Informal.
(an exclamation used to express joy, excitement, etc.)

Origin:
1960–65; perhaps alteration of yeah

Dictionary.com Unabridged

yay

2 [yey]
adverb Informal.
to the extent, amount, etc., indicated: The doll is about yay high.
Also, yea.


Origin:
probably < yea1

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
yay (jeɪ)
 
interj
informal an exclamation indicating approval, congratulation, or triumph
 
[C20: perhaps from yeah]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Computing Dictionary

Yay definition


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The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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