(impotence) Inability to develop or maintain an erection of the penis.

(impotence) Inability to perform sexual intercourse.

(impotence) Persistent or recurrent inability to achieve or to maintain an erection during sexual activity.

A multidimensional but common male sexual dysfunction that involves an alteration in any of the components of the erectile response, including organic, relational and psychological.

An inability to have an erection of the penis adequate for sexual intercourse.

Erectile dysfunction (ED) is a common type of male sexual dysfunction. It is when a man has trouble getting or keeping an erection. ED becomes more common as you get older. But it's not a natural part of aging. Some people have trouble speaking with their doctors about sex. But if you have ED, you should tell your doctor. ED can be a sign of health problems. It may mean your blood vessels are clogged. It may mean you have nerve damage from diabetes. If you don't see your doctor, these problems will go untreated. Your doctor can offer several new treatments for ED. For many men, the answer is as simple as taking a pill. Getting more exercise, losing weight, or stopping smoking may also help. NIH: National Institute of Diabetes and Digestive and Kidney Diseases

The inability in the male to have a PENILE ERECTION due to psychological or organ dysfunction.

The inability to attain or maintain an erection for satisfactory sexual intercourse.

The inability to get or maintain an erection sufficient for intercourse. Sometimes referred to as ED.

(male erectile disorder) A disorder characterized by the persistent or recurrent inability to achieve or to maintain an erection during sexual activity.

A disorder characterized by the persistent or recurrent inability to achieve or to maintain an erection during sexual activity.

Erectile dysfunction is the inability to attain or sustain an erection satisfactory for sexual intercourse. Most erectile dysfunction is related to vascular, neurologic, psychologic, and hormonal disorders; drug use can also be a cause. Evaluation typically includes screening for underlying disorders and measuring testosterone levels....

Erectile dysfunction (ED) affects 50% of men older than 40 years, exerting substantial effects on quality of life. This common problem is complex and involves multiple pathways.

Erectile dysfunction (impotence) is the inability to get and keep an erection firm enough for sex.

Erectile dysfunction (ED) is defined as the inability to achieve or maintain an erection sufficient for sexual performance.

Impotence, in general, the inability of a man to achieve or maintain penile erection and hence the inability to participate fully in sexual intercourse. In its broadest sense the term impotence refers to the inability to become sexually aroused; in this sense it can apply to women as well as to...