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).
Old people often have limited regenerative abilities and are more susceptible to disease, syndromes, and sickness than younger adults. The organic process of ageing is called senescence, the medical study of the aging process is called gerontology, and the study of diseases that afflict the elderly is called geriatrics. The elderly also face other social issues around retirement, loneliness, and ageism.
Old age is not a definite biological stage, as the chronological age denoted as "old age" varies culturally and historically.
In 2011, the United Nations proposed a human rights convention that would specifically protect older persons.
old; having lived for relatively many years
Of an object, being old-fashioned or frail due to aging
an elderly person
older people as a whole
plural of elderly
Somewhat old; advanced beyond middle age; bordering on old age; as, elderly people.
advanced in years; (`aged' is pronounced as two syllables);
"aged members of the society"
"elderly residents could remember the construction of the first skyscraper"