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showing a decline or deterioration of physical strength or mental functioning, especially short-term memory and alertness, as a result of old age or disease.
of or belonging to old age or aged persons; gerontological; geriatric.
Physical Geography. (of topographical features) having been reduced by erosion to a featureless plain that stands everywhere at base level.
Compare peneplain.
a senile person.
of, relating to, or characteristic of old age
mentally or physically weak or infirm on account of old age
(of land forms or rivers) at an advanced stage in the cycle of erosion See old (sense 18)

senile se·nile (sē’nīl’, sěn’īl’)

Relating to, characteristic of, or resulting from old age.

Exhibiting the symptoms of senility, as impaired memory or the inability to perform certain mental tasks.


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