of mature years
euphemism Old. I used to despise the idea of tour buses while traveling, but now that I'm of mature years, it sounds so appealing to have all that planning taken care of by someone else. We have a neighbor of mature years who is particularly sensitive to loud sounds, so if you don't mind, please turn the volume down.
of mature years
Euph. old. My employer is a man of mature years. The professor, a woman of mature years, is planning to retire at the end of the school term.