in DSM–5, a disorder characterized by high anxiety about one’s health, by excessive preoccupation with having an illness or acquiring it, and by behaviors associated with the presumed or feared condition (e.g., repeatedly checking oneself for possible signs of illness), yet with no significant somatic symptoms that would warrant such concern. 

a period of elevated, expansive, or irritable mood accompanied by various combinations of inflated self-esteem, a decreased need for sleep, increased speech, racing thoughts, distractibility, increased activity or psychomotor agitation, and increased involvement in risky activities (e.g., buying sprees, sexual indiscretions). 

n. excessive sleepiness during daytime hours or abnormally prolonged episodes of nighttime sleep. 

excessive anxiety and worry about a range of concerns (e.g., world events, finances, health, appearance, activities of family members and friends, work, school) accompanied by such symptoms as restlessness, fatigue, impaired concentration, irritability, muscle tension, and disturbed sleep.

DSM–5’s term for pathological gambling, categorized as a nonsubstance-related addiction rather than an impulse-control disorder (as in DSM–IV–TR). DSM–5 criteria for the disorder include persistent, recurrent gambling not related to manic episodes, along with significant impairment or distress.

the involuntary passage of flatus and feces in inappropriate places (clothing, floor, etc.) resulting from loss of bowel control due to an injury or physiological condition. 

n. a group of chronic brain disorders associated with disturbances in the electrical discharges of brain cells and characterized by recurrent seizures, with or without clouding or loss of consciousness.

in DSM–IV–TR, a mood disorder characterized by symptoms that are less severe but more enduring than those in major depressive disorder. It is identified as persistent depressive disorder in DSM–5. Also called dysthymia.

in DSM–5, a new diagnosis in children 18 years or younger with persistent irritability and an average of at least three episodes per week of extreme behavioral dyscontrol (e.g., severe rages). It has been established as an alternative to the diagnosis of bipolar disorder in children.

a dissociative disorder characterized by one or more episodes of depersonalization severe enough to impair social and occupational functioning.

in DSM–IV–TR and DSM–5, a personality disorder manifested in a long-term pattern of passively allowing others to take responsibility for major areas of life and of subordinating personal needs to the needs of others, due to lack of self-confidence and self-dependence.

in DSM–IV–TR, any one of a group of psychotic disorders with the essential feature of one or more nonbizarre delusions that persist for at least 1 month but are not due to schizophrenia. 

n. a disturbed mental state in which attention cannot be sustained, the environment is misperceived, and the stream of thought is disordered.

a mood disorder characterized by periods of hypomanic symptoms and periods of depressive symptoms that occur over the course of at least 2 years.

American Psychological Association

in DSM–IV–TR, a somatoform disorder in which patients present with one or more symptoms or deficits affecting voluntary motor and sensory functioning that suggest a physical disorder but for which there is instead evidence of psychological involvement.