The Collaborative International Dictionary of English v.0.48:

Instate \In*state"\, v. t. [imp. & p. p. Instated; p. pr. &
   vb. n. Instating.]
   To set, place, or establish, as in a rank, office, or
   condition; to install; to invest; as, to instate a person in
   greatness or in favor. --Shak.
   [1913 Webster]