: to say nothing of : not to mention
—used especially to emphasize the improbability of a contrasting example
… he would never walk again, let alone play golf.—
Sports Illus.
how many ever see an Ambassador or Minister, let alone a President—Robert Lacville
let alone
2 of 2phrase
: to leave undisturbed
let the flowers alone
also
: to leave to oneself
wanted to be let alone
Examples of let alone in a Sentence
Conjunction
I don't have enough money for a new car, let alone a luxury sedan.
Recent Examples on the Web
The Athletic College Football, New York Times, 10 Jan. 2026
Both sides of the river were identical—banks of dense forest with no sign of habitation, let alone border control.
—Stanley Stewart, Travel + Leisure, 10 Jan. 2026
But at the moment, nobody knows what the political situation will be in Venezuela a week from today, let alone in a year or a decade.
—Rogé Karma, The Atlantic, 10 Jan. 2026
During that time, she was transferred five times between facilities, separated from family, denied access to counsel, and confined in conditions that were deeply troubling and inappropriate for any person, let alone a United States citizen.
—Mike Hellgren, CBS News, 8 Jan. 2026
See All Example Sentences for let alone
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Conjunction
The four-team Playoff era wouldn’t have included teams ranked as low as Indiana’s first two opponents — let alone its national title opponent Miami — but the top seed’s dominance thus far has been astounding.
—Cite this Entry
“Let alone.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/let%20alone. Accessed 20 Jan. 2026.
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