n.
A person who has special knowledge or experience; an expert.
[Yiddish meyvn, from Hebrew mēbîn, active participle of hēbîn, to understand.]
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.
