To move backwards away from something.
To become less aggressive, particularly when one had appeared committed to act.
To lower the setting of.
You need to back off, or the situation could turn ugly.
Used other than figuratively or idiomatically: see back, off.
To turn or fold inwardly.
To fold inward to create a hollow space where none had existed, as with a gastrula forming from a blastula.
To fold up or enclose into a sheath-like or pouch-like structure, either naturally or as part of a surgical procedure.
Having one portion of a hollow organ drawn back within another portion.
sheathed