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 ).
The senior singles dating scene is alive and well, and websites like have cropped up with the sole intention of helping seniors navigate the world of online dating.
Studies from the National Institutes of Health note the importance of companionship and intimacy at every age.
In addition to chronological age, people can be considered old because of the other dimensions of old age.
For example, people may be considered old when they become grandparents or when they begin to do less or different work in retirement.
The age which qualifies for senior citizen status varies widely.
In governmental contexts, it is usually associated with an age at which pensions or medical benefits for the elderly become available.
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".
Old age refers to ages nearing or surpassing the life expectancy of human beings, and is thus the end of the human life cycle.
Terms and euphemisms include old people (worldwide usage), seniors (American usage), senior citizens (British and American usages), older adults (in the social sciences), the elderly, and elders (in many cultures—including the cultures of aboriginal people).
The age at which these discounts are available varies between 55, 60, 62 or 65, and other criteria may also apply.