A turn of the document
Not a formal term, but the one people use to say where a negotiation has got to and whose move it is.
What it means
A turn is one party's round of revisions to a document, passed back to the other side. The first draft goes out, comes back marked up — that is a turn — goes out again with responses, and so on until nobody has anything left to change.
"We're on the third turn" says roughly how far along a negotiation is. "It's with them" says whose move it is. Neither is a term of art; both are used constantly, because the alternative phrasings are all longer.
Why the word is useful
It counts the thing worth counting. Versions accumulate for all sorts of reasons — someone saves twice, a schedule is updated separately, an internal draft circulates — but a turn is an exchange, and an exchange is what costs time. A document on its sixth turn is in a different state from one on its second, whatever the version numbers say.
It also frames what a comparison is for. When a turn comes back, the first question is what they changed since the version you sent, which is a comparison between two specific drafts: yours as sent, and theirs as returned. Not the first draft, and not the version saved in between.
What a turn contains
Conventionally, a turn is sent as a clean copy and a redline against the version received, sometimes with a short covering note listing the substantive points. The redline is against what they were sent, not against the first draft, unless somebody says otherwise.
By convention one side holds the pen — keeps the master version and makes the edits — so a turn, for that side, is taking in the comments that came back and sending out a single reconciled draft rather than several competing ones.
Where that convention slips — a turn arrives clean, or marked up against the wrong version — running your own comparison is quicker than asking, and it answers the question you actually have rather than the one they thought you had.