Source : Webster's Revised Unabridged Dictionary (1913)

Dissertate \Dis"ser*tate\, v. i. [L. dissertatus, p. p. of
   dissertare to discuss, intents, fr. disserere. See
   {Dissert}.]
   To deal in dissertation; to write dissertations; to
   discourse. [R.] --J. Foster.

Source : WordNet®

dissertate
     v : talk or hold forth formally about a topic; "The speaker
         dissertated about the social politics in 18th century
         England" [syn: {discourse}]