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.
metric-a function of a topological space that gives, for any two points in the space, a value equal to the distance between them. metric function. math, mathematics, maths-a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement.