oat grass definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
any of various oatlike grasses; esp., any of several grasses (genera Arrhenatherum and Danthonia) growing on hillsides and in woods
oat grass definition by American Heritage Dictionary
- Any of various grasses of the genera Arrhenatherum and Danthonia.
- Any of several oatlike grasses.