The Collaborative International Dictionary of English v.0.48:

Promulgate \Pro*mul"gate\, v. t. [imp. & p. p. Promulgated; p.
   pr. & vb. n. Promulgating.] [L. promulgatus, p. p. of
   promulgare to promulgate; of unknown origin. Cf. Promulge.]
   To make known by open declaration, as laws, decrees, or
   tidings; to publish; as, to promulgate the secrets of a
   council.
   [1913 Webster]

   Syn: To publish; declare; proclaim. See Announce.
        [1913 Webster]