Superannuate Definition
so͝opər-ănyo͝o-āt
superannuated, superannuates, superannuating
verb
To set aside as, or become, old-fashioned or obsolete.
Webster's New World
To retire from service, esp. with a pension, because of old age or infirmity.
Webster's New World
Origin of Superannuate
-
Back-formation from superannuated; Latin super "over" + annus "year"
From Wiktionary
Back-formation from superannuated
From American Heritage Dictionary of the English Language, 5th Edition
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