n. Senescence; the bodily and mental deterioration associated with old age.
n. The losing of memory and reason due to senescence.
n. An elderly, senile person.
the GNU version of the Collaborative International Dictionary of English
n. The quality or state of being senile; old age.
The Century Dictionary and Cyclopedia
n. The state of being senile; old age; especially, the weakness or imbecility of old age.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. the state of being senile
n. mental infirmity as a consequence of old age; sometimes shown by foolish infatuations
Word Usage
"Many people greatly misuse the word senility when wanting to convey the idea that the aged individual that they are referring to has memory loss, confusion etc., when the appropriate word is dementia."