The act of passing back; passage back; return; retrogression.

The power or liberty of passing back.

(property law) The right of a person (such as a lessee) to return to a property.

(intransitive) Move backwards to an earlier stage or devolve, particularly in terms of re-developing behavior that was previously grown out of, especially behaviors left behind in childhood.

(intransitive, astronomy) To move in the retrograde direction.(clarification of this definition is needed)

(intransitive, medicine) To reduce in severity or size (as of a tumor), without reaching total remission.

(transitive, statistics) To perform a regression on an explanatory variable.

(transitive) To interrogate a person in a state of trance about forgotten elements of their past.