Hypomanic episode refers to a less severe and less disruptive version of a manic episode that is one of the criteria for several mood disorders; a period of elated mood not as extreme as a manic episode, with symptoms of at least four (4) days duration that are less extreme and less disruptive than that of a full-blown manic episode.
Other /More definition:
hypomanic episode refers to less severe and less disruptive version of a manic episode that is one of the criteria for several mood disorders.
Lexicon of Psychology - Terms, Treatments, Biographies,