noun
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.
verb
(intransitive) To move backwards to an earlier stage; to devolve.
(intransitive, astronomy) To move in the retrograde direction.
(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.