nounThe American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A slim-bodied hawk (Circus cyaneus) found in marshy areas of northern North America and Eurasia, having an owllike face and a white patch on the tail. Also called hen harrier, marsh hawk.