constipation

n. condition in which evacuation of the bowels is difficult and does not occur regularly

Constipation or irregularity, is a condition of the digestive system where a person (or animal) experiences hard feces that are difficult to egest. It may be extremely painful, and in severe cases (fecal impaction) lead to symptoms of bowel obstruction. The term obstipation is used for severe constipation. Causes of constipation may be dietary, hormonal, anatomical, a side effect of medications (e.g. some painkillers), or an illness or disorder. Treatments consist of changes in dietary and exercise habits, the use of laxatives, and other medical interventions depending on the underlying cause.
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n. constipation, condition in which evacuation of the bowels is difficult and does not occur regularly

(n.)
Act of crowding anything into a less compass, or the state of being crowded or pressed together; condensation.
  

(n.)
A state of the bowels in which the evacuations are infrequent and difficult, or the intestines become filled with hardened faeces; costiveness.
  

Infrequent (and frequently incomplete) bowel movements. The opposite of diarrhea, constipation is commonly caused by irritable bowel syndrome, diverticulosis, and medications (constipation can paradoxically be caused by overuse of laxatives). Colon cancer can narrow the colon and thereby cause constipation. The large bowel (colon) can be visualized by barium enema x-rays, sigmoidoscopy, and colonoscopy. Barring a condition such as cancer, high-fiber diets can frequently relieve the constipation.