irretentive

[ir-i-ten-tiv]
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adjective

not retentive; lacking power to retain, especially mentally.

Origin of irretentive

First recorded in 1740–50; ir-2 + retentive
Related formsir·re·ten·tive·ness, ir·re·ten·tion, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for irretentive

irretentive

adjective

not retentive
Derived Formsirretentiveness, noun
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