1. The long hair along the top and sides of the neck of certain mammals, such as the horse and the male lion.
2. A long thick growth of hair on a person's head.

[Middle English, from Old English manu.]

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.