1. often Evangelist Any one of the authors of the four New Testament gospel books: Matthew, Mark, Luke, or John.
2. One who practices evangelism, especially a Protestant preacher or missionary.

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.