[su.per.an.nu.ate] vb -at.ed ; -at.ing [back-formation fr. superannuated] vt (1649) 1: to make, declare, or prove obsolete or out-of-date
2: to retire and pension because of age or infirmity ~ vi 1: to become retired
2: to become antiquated -- su.per.an.nu.a.tion n