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

“Under this Court’s precedents, not to mention common sense, those circumstances taken together can constitute at least reasonable suspicion of illegal presence,” he said in a concurrence.

From The Wall Street Journal • Apr. 9, 2026

Egypt, though not directly involved in the war, has contended with its repercussions on energy, fertilizer and food prices, not to mention disruptions to shipping income Cairo receives through the Suez Canal.

From Los Angeles Times • Mar. 30, 2026

That is quite the takeaway, not to mention depressingly way off base from the point.

From Salon • Mar. 21, 2026

"I can't help but wonder the amount of money that's been spent on this strike, not to mention the negative image of Birmingham City Council that's been created, not just locally but nationally."

From BBC • Mar. 11, 2026

But Miss Rossit and I both agreed that we might end up killing the trees in the process, not to mention other creatures.

From "Willodeen" by Katherine Applegate