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.
kilometer - a metric unit of length equal to 1000 meters (or 0.621371 miles) kilometre, klick, km. metric linear unit - a linear unit of distance in metric terms. hectometer, hectometre, hm - a metric unit of length equal to 100 meters. mym, myriameter, myriametre - a metric unit of length equal to 10,000 meters.