chronological age
noun
: the age of a person as measured from birth to a given date
His chronological age is five, but his mental age is three—he thinks and behaves like a three-year-old.
Examples of chronological age in a Sentence
Recent Examples on the Web
Biological age is different from chronological age.
—
Scott Lafee, San Diego Union-Tribune, 19 Aug. 2025
Being able to see heart age and chronological age side by side makes heart health easier to understand, Nour Makarem, PhD, cardiovascular epidemiologist and assistant professor at the Columbia University Mailman School of Public Health, told Health.
—Kristen Fischer, Health, 9 Aug. 2025
This is especially true if your heart’s biological age is at least a decade higher than your chronological age, Shapiro says.
—Tom Gavin, EverydayHealth.com, 6 Aug. 2025
Researchers found that people with brains that were older than their chronological age tended to die sooner than those with brains that were younger than their actual age.
—Alice Park, Time, 9 July 2025
The research, published in the journal Menopause, found that both chronological age and reproductive age play a key role in reducing various forms of anger in women between the ages of 35 and 55.
—Daniella Gray, MSNBC Newsweek, 2 July 2025
Among the people with cancer, the tool generated a higher biological age that was about five years higher than their chronological age.
—Melissa Rudy, FOXNews.com, 12 May 2025
Methylation levels at hundreds of gene sites have been closely correlated with chronological age.
—Byandrew Curry, science.org, 27 Feb. 2025
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Scott Lafee, San Diego Union-Tribune, 19 Aug. 2025
Being able to see heart age and chronological age side by side makes heart health easier to understand, Nour Makarem, PhD, cardiovascular epidemiologist and assistant professor at the Columbia University Mailman School of Public Health, told Health.
—Kristen Fischer, Health, 9 Aug. 2025
This is especially true if your heart’s biological age is at least a decade higher than your chronological age, Shapiro says.
—Tom Gavin, EverydayHealth.com, 6 Aug. 2025
Researchers found that people with brains that were older than their chronological age tended to die sooner than those with brains that were younger than their actual age.
—Alice Park, Time, 9 July 2025
The research, published in the journal Menopause, found that both chronological age and reproductive age play a key role in reducing various forms of anger in women between the ages of 35 and 55.
—Daniella Gray, MSNBC Newsweek, 2 July 2025
Among the people with cancer, the tool generated a higher biological age that was about five years higher than their chronological age.
—Melissa Rudy, FOXNews.com, 12 May 2025
Methylation levels at hundreds of gene sites have been closely correlated with chronological age.
—Byandrew Curry, science.org, 27 Feb. 2025
Cite this Entry
“Chronological age.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/chronological%20age. Accessed 16 Sep. 2025.
Copy CitationMedical Definition
chronological age
noun
chro·no·log·i·cal age
ˌkrän-ᵊl-ˌäj-i-kəl-, ˌkrōn- 
: the age of a person as measured from birth to a given date compare achievement age
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