emeritus

nouns

a professor or minister who is retired from assigned duties
emeritus
is a type of (narrower)
someone who has retired from active working
retired person, retiree

adjectives

honorably retired from assigned duties and retaining your title along with the additional title `emeritus' as in `professor emeritus'
emeritus
is similar to
(used especially of persons) having lived for a relatively long time or attained a specific age
"his mother is very old"; "a ripe old age"; "how old are you?"
old