Dating among older adults
Therefore, rather than lumping together all people who have been defined as old, some gerontologists have recognized the diversity of old age by defining sub-groups.
One study distinguishes the young old (60 to 69), the middle old (70 to 79), and the very old (80 ).
However, for its study of old age in Africa, the World Health Organization (WHO) set 50 as the beginning of old age.
At the same time, the WHO recognized that the developing world often defines old age, not by years, but by new roles, loss of previous roles, or inability to make active contributions to society.
The age at which these discounts are available varies between 55, 60, 62 or 65, and other criteria may also apply.
Sometimes a special "senior discount card" or other proof of age needs to be obtained and produced to show entitlement.
Especially in less formal contexts, it is often abbreviated as "senior(s)", which is also used as an adjective.
In commerce, some businesses offer customers of a certain age a "senior discount".
The United Nations has agreed that 60 years may be usually denoted as old age and this is the first attempt at an international definition of old age.
Chronological age may differ considerably from a person's functional age.
The distinguishing marks of old age normally occur in all five senses at different times and different rates for different persons.
The AARP allows couples in which one spouse has reached the age of 50 to join, regardless of the age of the other spouse.
The distinguishing characteristics of old age are both physical and mental.