1) Become obsolete 2) Declare to be obsolete 3) Retire 4) To retire due to age 1) Retire 
to discharge as being too old
• (v. t.) To give a pension to, on account of old age or other infirmity; to cause to retire from service on a pension. • (v. i.) To last beyond the year; -- said of annual plants. • (v. t.) To impair or disquality on account of age or infirmity.
Su`per·an'nu·ate transitive verb [ imperfect & past participle Superannuated ; present participle & verbal noun Superannuating .] [ Prefix super- + Latin annus a year.] 1. To impair or disquality on account of age...
[v] - retire and pension (someone) because of age or physical inability 2. [v] - declare to be obsolete 3. [v] - become obsolete 4. [v] - retire or become ineligible because of old age or infirmity
superannuate (soo' pur AN yoo ayt') 1. To allow someone to retire from a service or an office on a pension because of age or infirmity. 2. To set aside as out of date or to discard as old-fashioned or obsolete; to remove as too old. 3. To be or to become old, out of date, or unfit for further service.