superannuate

verb

su·​per·​an·​nu·​ate ˌsü-pər-ˈan-yə-ˌwāt 

superannuated; superannuating

transitive verb

1

: to make, declare, or prove obsolete or out-of-date

2

: to retire and pension because of age or infirmity

intransitive verb

1

: to become retired

2

: to become antiquated

superannuation

ˌsü-pər-ˌan-yə-ˈwā-shən 

noun

Word History

Etymology

back-formation from superannuated

First Known Use

1649, in the meaning defined at transitive sense 1

Kids Definition

superannuate

verb

su·​per·​an·​nu·​ate ˌsü-pə-ˈran-yə-ˌwāt 

superannuated; superannuating

1

: to retire and pension because of age or infirmity

2

: to become retired

3

: to become outdated

superannuation

-ˌran-yə-ˈwā-shən 

noun