Source : Webster's Revised Unabridged Dictionary (1913)

Indoctrinate \In*doc"tri*nate\, v. t. [imp. & p. p.
   {Indoctrinated}; p. pr. & vb. n. {Indoctrinating}.] [Pref.
   in- in + L. doctrina doctrine: cf. F. endoctriner.]
   To instruct in the rudiments or principles of learning, or of
   a branch of learning; to imbue with learning; to instruct in,
   or imbue with, principles or doctrines; to teach; -- often
   followed by in.

         A master that . . . took much delight in indoctrinating
         his young, unexperienced favorite.       --Clarendon.