relapse: Meaning and Definition of

re•lapse

1. to fall or slip back into a former state, practice, etc.: to relapse into silence.
2. to fall back into illness after convalescence or apparent recovery.
3. to fall back into vice, wrongdoing, or error; backslide: to relapse into heresy.

1. an act or instance of relapsing.
2. a return of a disease or illness after partial recovery from it.