The 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.
Any of various usually weedy grasses of the genus Agrostis native to chiefly temperate regions. Some are grown for pasture, turf, or putting greens on golf courses.