(n.) An old man.

Father Time Methuselah Nestor Old Paar centenarian dotard elder gaffer geezer golden-ager gramps grandfather grandsire gray-headed person grayhair grisard nonagenarian octogenarian old chap old codger old dog old duffer old geezer old gent old gentleman old man old party old-timer older oldster pantaloon patriarch presbyter senior citizen septuagenarian sexagenarian the quiet-voiced elders venerable sir veteran