Excessive volume of urination means that you release abnormally large amounts of urine each day. The medical term for this condition is polyuria. 

An excessive volume of urination for an adult would be at least 2.5 liters of urine per day.

Polyuria is a fairly common symptom, which is often noticed when you have to get up to use the bathroom at night.

• Too much fluid intake, particularly fluids containing caffeine or alcohol
• Too much salt or glucose (if diabetic)
• Drug use, especially diuretics
• Diabetes (including diabetes insipidus)
• Psychogenic polydipsia, most common in women over age 30
• Renal failure
• Sickle cell anemia
• Radiographic tests that use a contrast media
  • Urine volume will increase for up to 24 hours following the dose

Intake and output of fluids should be monitored. Record daily weights at the same time(s) and on the same scales.