let alone

1. Not to mention, as in We have no room for another house guest, let alone an entire family . [c. 1800]

2. See leave someone alone .

Example Sentences

"Many MPs are still relatively unfamiliar with normal parliamentary procedure, let alone for private members’ bills, of which this will be the first in this Parliament."

From BBC

There are scenes where I’m sobbing and a scene with a bar fight — I’ve never been in a bar fight in real life, let alone on-screen.

From Los Angeles Times

It will not bring an end to violence, let alone usher in democracy, but it would open the space for serious negotiations.

From BBC

Marvel has yet to announce a third “Black Panther” film, let alone Coogler’s involvement in another installment of the popular franchise.

From Los Angeles Times

But he added that he'd "be amazed if the sequel is remembered by Christmas, let alone in 24 years".

From BBC