be on in years

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be on in years

To be advanced or advancing in age; to be old or aging. I might be a little bit on in years, but I'm no fool when it comes to technology! Your grandfather's on in years, so you may need to speak a bit more loudly around him.
See also: on, year
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
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