The Collaborative International Dictionary of English v.0.48:

Instaurate \In*stau"rate\, v. t. [imp. & p. p. Instaurated; p.
   pr. & vb. n. Instaurating.] [L. instauratus, p. p. of
   instaurare to renew. See 1st In-, and Store.]
   To renew or renovate. [R.]
   [1913 Webster]