dotard n : an oldster in his dotage; someone whose age has impaired his intellect

English

Noun

1. an old person with impaired intellect; one in his dotage

Father Time, Methuselah, Nestor, Old Paar, centenarian, elder, fogy, fuddy-duddy, gaffer, geezer, golden-ager, gramps, grandfather, grandsire, graybeard, nonagenarian, octogenarian, old chap, old codger, old dog, old duffer, old fart, old fogy, old geezer, old gent, old gentleman, old man, old party, old-timer, older, oldster, pantaloon, patriarch, presbyter, senile, senior citizen, septuagenarian, sexagenarian, the quiet-voiced elders, venerable sir, veteran