Communication (from Latin commūnicāre, meaning "to share") is the act of conveying intended meanings from one entity or group to another through the use of mutually understood signs and semiotic rules.
Journalism refers to the production and distribution of reports on recent events. The word journalism applies to the occupation (professional or not), the methods of gathering information and organising literary styles. Journalistic mediums include print, television, radio, Internet and in the past: newsreels.
Publishing is the dissemination of literature, music, or information—the activity of making information available to the general public. In some cases, authors may be their own publishers, meaning originators and developers of content also provide media to deliver and display the content for the same. Also, the word publisher can refer to the individual who leads a publishing company or an imprint or to a person who owns/heads a magazine.
If I publish this poem for you, speaking as a trader, I shall be a considerable loser. Did I publish all I admire, out of sympathy with the author, I should be a ruined man.
Edward Bulwer-Lytton, My Novel, Book VI, Chapter XIV.
If the bookseller happens to desire a privilege for his merchandize, whether he is selling Rabelais or the Fathers of the Church, the magistrate grants the privilege without answering for the contents of the book.
The duty of journalists is to tell the truth. Journalism means you go back to the actual facts, you look at the documents, you discover what the record is, and you report it that way.
Noam Chomsky interview in Wang, Joy (December 2004). "Lecture: Noam Chomsky". Bullpen: NYU Journalism (New York University). Retrieved on 2009-02-20.