not to mention

1. 1.

   much less

   “she can't boil potatoes, let alone cook a meal”

   Synonymslet alone

Questions about not to mention

What does not to mention mean?

not to mention means "much less".

What is another word for not to mention?

Close synonyms include let alone. Each sense on this page lists its own synonyms, because a word with several meanings rarely has one substitute that works for all of them.

Is not to mention a common word?

not to mention is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.