not to mention

Idioms  

1. Also, not to speak of; to say nothing of. In addition to, besides what's already been said. For example, I don't think the voters will want that big program, not to mention the cost, or Dave teaches trumpet and trombone, not to speak of other brass instruments, or Their house is worth at least a million, to say nothing of their other assets.

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Example Sentences

For most beginners, taking these few, easy steps can have a significant impact on strengthening your long-term creditworthiness — not to mention building your financial confidence.

From MarketWatch • Jun. 17, 2026

"We have noticed the impact that smartphones have on students, particularly in terms of their concentration, not to mention the safeguarding issues that come up," she said.

From BBC • Jun. 16, 2026

It’s the biggest global showcase for the world’s most popular sport, not to mention a television and marketing enterprise many times larger than the Super Bowl, the NBA Finals or the Oscars.

From Salon • Jun. 11, 2026

"Transporting a stone of this size over such a long distance would have required planning, coordination and a deep understanding of the landscape -- not to mention tremendous determination," Dr. Clarke said.

From Science Daily • Jun. 9, 2026

I’ve met crows named WindChime, EighteenWheeler, and GrouchyCabDriver, not to mention a few others that are not appropriate for polite company.

From "Wishtree" by Katherine Applegate