Definition of let alone in English:

let alone

Used to indicate that something is far less likely, possible, or suitable than something else already mentioned: he was incapable of leading a bowling team, let alone a country
More example sentences
  • I don't want to share the same room with her and the hounds, let alone a mortgage.
  • Who on earth would be prepared, let alone equipped to take on such a challenge?
  • At the time he had no idea how to start a business, let alone find the financial backing to realise his dream.
See parent entry: let

Definition of let alone in: