1. a little brook; rivulet
2. to flow in or like a rill
Webster’s New World College Dictionary, Fourth Edition, compiled by the
editors of Webster’s New World Dictionaries. Copyright © 2010 by Houghton
Mifflin Harcourt. Published by Houghton Mifflin Harcourt. All rights reserved.
Word origin of 'rill'< Du ril or LowG rille < *ridula, dim. of Gmc base seen in OE rith, small stream