Definitions
1.VerbTo 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 a stupor, into vice, or into barbarism; to relapse into slumber after being disturbed"
2.VerbTo recur; to worsen, be aggravated (after a period of improvement).
3.VerbTo return to a vice, especially self-harm or alcoholism, failing to maintain abstinence."relapsed after 5 months of being clean"
4.VerbTo slip or slide back physically; to turn back.
5.NounThe act or situation of relapsing."a drug relapse"
6.NounAn occasion when a person becomes ill again after a period of improvement
7.NounOne who has relapsed, or fallen back into error; a backslider.