and also someone or something else Gaining weight didn't help her health, not to mention the high blood pressure that ran in her family.They don't have any of the players from that championship team anymore, not to mention manager Casey Stengel.
Usage notes: used to add emphasis to what you are saying
Also, not to speak of; to say nothing of. In addition to, besides what's already been said. For example, I don't think the voters will want that big program, not to mention the cost, or Dave teaches trumpet and trombone, not to speak of other brass instruments, or Their house is worth at least a million, to say nothing of their other assets.