the GNU version of the Collaborative International Dictionary of English
n. One who, or that which, disseminates, spreads, or propagates.
The Century Dictionary and Cyclopedia
n. One who or that which disseminates or spreads by propagation.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. someone who spreads the news
Word Usage
"The radio was a powerful disseminator of propaganda, while lightweight and inexpensive 35mm cameras enabled the regime to document its crimes so thoroughly."