regress /ˈɹiːˌɡɹɛs/verb 6noun 3forms 3 verb6 •To move backwards to an earlier stage; to devolve. •To re-develop behavior one had previously grown out of, particularly a behavior left behind in childhood.Your nightmares stopped when you were eight years old, but after the house burned down, you regressed. •To perform a regression on an explanatory variable.When we regress Y on X, we use the values of variable X to predict those of Y. •To reduce in severity or size (as of a tumor), without reaching total remission. •To move in the retrograde direction. •To interrogate a person in a state of trance about forgotten elements of their past.They regressed me, putting me under hypnosis. Then, through the hypnosis, they found out that our car was abducted right off the road and into a craft. — 2018 noun3 •The act of passing back; passage back; return; retrogression.The key-hole was still their port of egress and regress, and it resembled the aperture of a bee-hive, on a sunny day in June. — 1850 •The power or liberty of passing back.Thou shalt have egresse and regresse. — 1597 •The right of a person (such as a lessee) to return to a property. formsregressed · regressing · regresses