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).
This in turn usually implies that the person is over the retirement age, which varies according to country.
Synonyms include old age pensioner or pensioner in British English, and retiree and senior in American English.
The age at which these discounts are available varies between 55, 60, 62 or 65, and other criteria may also apply.
It has come into widespread use in recent decades in legislation, commerce, and common speech.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.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.Some dictionaries describe widespread use of "senior citizen" for people over the age of 65.