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.
The noun KM has 1 sense: 1  1. a metric unit of length equal to 1000 meters (or 0.621371 miles) 2  Meaning: 3  A metric unit of length equal to 1000 meters (or 0.621371 miles) 4  Classified under: 5  Nouns denoting quantities and units of measure. 6  Synonyms: 7  kilometer; kilometre; klick; km. 8  Hypernyms (km is a kind of...):