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grownup

[grohn-uhp] /ˈgroʊnˌʌp/
noun
1.
a mature, fully grown person; adult.
Origin of grownup
1805-1815
1805-15; noun use of verb phrase grow up
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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14
18
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