superannuate

verb

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

\

superannuated; superannuating

Definition of superannuate

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1 : to make, declare, or prove obsolete or out-of-date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

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The first known use of superannuate was in 1649

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