To give up one's work, business, career, etc., esp. because of advanced age
To cause to become obsolete.
To remain in a state or condition; stay:
Find another word for superannuate. In this page you can discover 9 synonyms, antonyms, idiomatic expressions, and related words for superannuate, like: pension, retire, obsolesce, obsolete, put-out-to-pasture, keep, new, used and outdate.