Warning Signs. While a bottleâs stamped expiration date generally confirms waterâs freshness, certain physical signs may still suggest spoilage. A bent or deformed bottle indicates its overexposure to sunlight, while a strange aroma or flavor denotes staleness. Occasionally, algae may form in bottled water.
mobility (mÉÊËbÉªlÉªtÉª) n 1. (Physiology) the ability to move physically: a knee operation has restricted his mobility; mobility is part of physical education. 1  2. (Sociology) sociol (of individuals or social groups) movement within or between classes and occupations. 2  1. the quality of being mobile.
Social mobility refers to the movement of individuals or groups in social position over time. Most commonly, social mobility refers to the change in wealth and social status of individuals or families. However, it may also refer to changes in health status, literacy rate, education, or other variables among groups such as classes, ethnic groups, or countries.