Definitions for "Hyperglycemia"
increased level of glucose in the blood.
A greater-than-normal level of glucose in the blood (high blood glucose). Fasting blood-glucose values greater than 105 mg/dl (5.8 mmol) are suspect; greater than 140 mg/dl (7.8 mmol) are diagnostic.
High blood glucose levels. If your body does not have enough insulin and blood glucose levels are at too high a level, you may begin to feel very thirsty, sluggish, weak, tired, achy, and nauseous.