Superannuate \Su`per*an"nu*ate\, v. t. [imp. & p. p. Superannuated; p. pr. & vb. n. Superannuating.]

[Pref. super- + L. annus a year.]

1. To impair or disquality on account of age or infirmity. --Sir T. Browne.

2. To give a pension to, on account of old age or other infirmity; to cause to retire from service on a pension.

Source: Webster's Revised Unabridged Dictionary (1913)