Superannuate :: Superannuate (v. t.) To impair or disquality on account of age or infirmity.
Superannuate :: Superannuate (v. t.) To give a pension to, on account of old age or other infirmity; to cause to retire from service on a pension..
Superannuation :: Superannuate (v. i.) To last beyond the year; -- said of annual plants.