(1). An idiom that is used when an email is sent to a group of people solely for the purpose of confirming something is complete (so you can all get off my case about it already!).
“Hi everyone – Just to close the loop on this, the wire went out today, so we should be all set. Great job getting this done for his Royal Highness, the Prince of Nigeria, so quickly. I can’t believe we were holding all of his money in someone else’s account all this time!”