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 adjective. âº using or ârelating to a âsystem of âmeasurement that uses âmetres, âcentimetres, âlitres, etc.: The ârecipe is given in both metric and âimperial âmeasures. Most âhigh-tech âindustry has been metric for âdecades. the metric âsystem. More examples. 1  Imperial â units have in many â cases been â replaced by metric â ones in â Britain. 2  They used a metric â system of â measuring and â weighing.