Premature old age as judged by physical or mental deterioration.
Pematurely showing the effects of advanced age.
Referring to a condition which affects people of early or middle age but has characteristics of a more advanced age.
An outdated term describing the condition of premature ageing. The mental and physical faculties are adversely affected in presenility to an extent that does not usually occur until old age.
Occurring before the expected onset of age-related changes, that is, in middle age. The word is usually used to describe dementia that occurs relatively early in life.