relapse /ɹɪˈlæps/verb 4noun 3forms 5 verb4 •To fall back again; to slide or turn back into a former state or practice.He has improved recently but keeps relapsing into states of utter confusion.to relapse into slumber after being disturbed •To return to a vice, especially self-harm or alcoholism, failing to maintain abstinence. •To slip or slide back physically; to turn back.You slip your hold and change your side, Relapsing from a necessary guide. — 1700 •To recur; to worsen, be aggravated (after a period of improvement). noun3 •The act or situation of relapsing.Alas! from what high hope to what relapse / Unlooked for are we fallen! — 1671 •An occasion when a person becomes ill again after a period of improvement •(no longer used) One who has relapsed, or fallen back into error; a backslider. formsrelapsed · relapsing · relapses · relapseth · relapsest