1. Characteristic of a decrepit person who exhibits the weakness or diseases of the declining years: Mr. Black, the senile patient at the nursing home, always wanted to sit outside instead of being in his room.
2. Belonging to, suited for, or an incident of the golden years: The retired chairman of the board, Mr. Fisk, walked with a senile gait because of his ripe and waning existence.
3. Forgetful, confused, or otherwise mentally less acute in later life: Like many other people, Mr.Evans had a senile moment when he walked into the room and forgot what he was looking for.
4. Occurring in or believed to be characteristic of being a senior; especially, during the period after the mid sixties: Because of his senile age, the law required the man to take a test drive before renewing his driver’s license.

The pruritus of the aged, probably caused by a lack of oil in the skin; and which accompanies the atrophy of the skin in old age.

Wasting of tissues and organs with advancing age from decreased catabolic or anabolic processes, at times due to endocrine changes, decreased use, or ischemia.

A form of senile dementia, usually of acute onset and characterized by disorientation, restlessness, insomnia, hallucinations, and aimless wandering.

A form of brain disorder marked by unusually accelerated and progressive, irreversible mental deterioration: Senile dementia is often associated with declining people who appear to experience memory loss, forgetfulness, and disorientation.

A slowly progressing decline in physical and mental health, apparently as a result of natural causes resulting from the processes of aging: Karen was worried about the senile deterioration of her neighbor who was almost 90 years old and was no longer able to go for walks without hanging on to her daughter's arm.

Mike's neighbor, who was 85 and formerly an Olympic swimmer, apologized because he figured that his senile deterioration was limiting him to swim 29 laps; while his younger neighbor, who is 55 years old, thought he was doing pretty good when he could swim nine laps.

The degeneration of the elastic tissue of the dermis (skin), due to old age.

The slowly progressive degenerative changes seen with advanced age, often with the loss of muscle and subcutaneous tissues and the shrinkage of other organs: A dynamic field of study in gerontology is senile involution which involves research about unpleasant aging changes; among them, aches and pains; decreased vigor, healing ability, sensory acuity, muscle tone, bone density; memory deficits; wrinkles; loss of beauty, friends, family, and independence; increased reliance on doctors and pills; and social isolation.

The backward curving of the cervical, thoracic, and lumbar vertebrae due to aged related degeneration of the intervertebral discs.

1. Improved near vision in the aged as a result of increased refractivity of the nucleus of the lens causing myopia.
2. The power of discerning what is not visible to the physical eye, or of foreseeing future events; such as are of a disastrous kind, the capacity of a seer or prophetic vision.