1. (noun) an elderly person

• old person
• oldster
• senior citizen

1. (noun) an elderly person

• adult
• grownup

1. (noun) an elderly person

• ancient
• antediluvian
• back-number
• has-been
• centenarian
• curmudgeon
• dodderer
• dodo
• fogey
• fogy
• fossil
• dotard
• graybeard
• greybeard
• methuselah
• old man
• nonagenarian
• octogenarian
• old boy
• old woman
• septuagenarian
• sexagenarian