Lock-off
Securing rope so that it will not come undone, from a simple hitch on a harness to a more robust lock where an upline meets the suspension point.
Shibari Study’s glossary defines locking off as fixing rope in a way that will not come undone. It distinguishes a simple hitch, which may be enough on a harness, from the more robust methods used for uplines. Anatomie Studio uses the term in the context of suspension: when an upline is made, the rope has to be connected securely both at the suspension point and at the person in rope.