1
general::
Phrase(s): let someone, something, or some creature alone
Go to leave someone, something, or some creature alone., Phrase(s): let someone or something alone [and] leave someone or something alone; leave someone or something be
to avoid touching, bothering, or communicating with someone or something. • Leave me alone. I don’t want your help. • Let it alone! Don’t touch it! It may be hot!, Phrase(s): let alone someone or something
not to mention or think of someone or something; not even to take someone or something into account. (Fixed order.) • Do I have a dollar? I don’t even have a dime, let alone a dollar. • I didn’t invite John, let alone the rest of his family.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
1. See LEAVE SOMEONE ALONE. 2. Not to mention, as in We have no room for another house guest, let alone an entire family. [c. 1800]
American Heritage Idioms