A person who has special knowledge or experience; an expert.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "maven" in a sentence
"SAFIRE: Well, language maven, and maven, of course, is a Yiddish word for connoisseur."
"The word maven Luntz is a sharp character, but he's more interested in "message development" than in searching for truth."
"Rachael Ray, the ever-perky talk show host/” 30-Minute Meal” maven, is upset over rumors about her marriage being on the rocks."