Source : Webster's Revised Unabridged Dictionary (1913)

Propagandist \Prop`a*gan"dist\, n. [Cf. F. propagandiste.]
   A person who devotes himself to the spread of any system of
   principles. ``Political propagandists.'' --Walsh.

Source : WordNet®

propagandist
     adj : of or relating to or characterized by propaganda [syn: {propagandistic}]

propagandist
     n : a person who disseminates messages calculated to assist some
         cause or some government