the level of native mental ability or capacity of an individual, usually as determined by an intelligence test, in relation to the chronological age of the average individual at this level: a ten-year-old child with the mental age of a twelve-year-old; a mental age of twelve.
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- Compare achievement age.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use mental age in a sentence
The victim in the Arizona case, Adkins, was mentally disabled and was estimated to have a mental age of 13.The Reverse Travyon Martin Case and the Other George Zimmerman | Michael Daly | July 16, 2013 | THE DAILY BEAST
Miranda was very young at the time of writing, compared with her present mental age.Woman in the Nineteenth Century | Margaret Fuller Ossoli
The calculation of mental age is therefore simplicity itself.The Measurement of Intelligence | Lewis Madison Terman
This figure we will use to indicate his mental age as distinguished from his chronological or physical or actual age.Vocational Psychology: Its Problems and Methods | Harry L. Hollingworth
If a child's mental age is the same as his chronological age, he is just average, neither bright nor dull.Psychology | Robert S. Woodworth
This is the mental age divided by the chronological, and is usually expressed in per cent.Psychology | Robert S. Woodworth
British Dictionary definitions for mental age
psychol the mental ability of a child, expressed in years and based on a comparison of his test performance with the performance of children with a range of chronological ages: See also intelligence quotient
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