approaching or around the age of 40 years.
around the number 40 or a quantity of 40.

Origin of fortyish

First recorded in 1815–25; forty + -ish1 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for fortyish

Contemporary Examples of fortyish

Historical Examples of fortyish

  • His hair was graying slightly at the temples, with a fortyish hairline.

    Check and Checkmate

    Walter Miller