| Noun | 1. | hyperkalemia - higher than normal levels of potassium in the circulating blood; associated with kidney failure or sometimes with the use of diuretic drugs symptom - (medicine) any sensation or change in bodily function that is experienced by a patient and is associated with a particular disease hypokalemia - abnormally low level of potassium in the circulating blood leading to weakness and heart abnormalities; associated with adrenal tumors or starvation or taking diuretics |