Hypertension, or high blood pressure, is a condition in which blood-pressure at rest is higher than the body's needs. Because hypertension lacks overt symptoms, high blood pressure can go unnoticed for years.
2. metric-a decimal unit of measurement of the metric system (based on meters and kilograms and seconds); convert all the measurements to metric units; it is easier to work in metric. metric unit.
Definition of metric. 1  1 metrics plural : a part of prosody that deals with metrical (see metrical 1) structure the analytical study of metric â T. S. Eliot. 2  2 : a standard of measurement no metric exists that can be applied directly to happiness â Scientific Monthly.