There is no universally agreed definition of health. Its meaning has changed through the ages and in different cultures. The term derives from the Anglo-Saxon word "haelth," meaning safe, sound or whole. In medieval times "haelthing" meant "sharing a few drinks with one's friends," having previously meant "hello" and "holiness." In recent decades, health has been taken to mean "the absence of disease." The term "disease" generally refers to a diagnosable physical abnormality while "illness" mea.