I examined the use and meaning of “Touch Base” in my previous Professional Patois post.
It is, of course, common to have meetings electronically and as a consequence, to touch base offline has come to mean a short follow up meeting, in person, usually between just two (or a smaller group of) the participants.
The reason I have added it as a separate post, is that it is now being used in face to face meetings as well.
When a matter for discussion only affects two people in the room, somebody will suggest that they “touch base offline” meaning after the meeting and outside of this room. Indeed, it might even mean by phone or email.
So we have come full circle to where an expression means almost the opposite of what it means.