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.
â¢ KILOMETER (noun). The noun KILOMETER has 1 sense: 1. a metric unit of length equal to 1000 meters (or 0.621371 miles). Familiarity information: KILOMETER used as a noun is very rare. KILOMETER (noun). The noun KILOMETER has 1 sense: 1. a metric unit of length equal to 1000 meters (or 0.621371 miles). Familiarity information: KILOMETER used as a noun is very rare.