Gregorian chant 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.
a ritual plainsong, monophonic and unmeasured, traditionally codified by Pope Gregory I, and formerly widely used in the Roman Catholic Church
Gregorian chant definition by American Heritage Dictionary
noun Roman Catholic ChurchThe 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.
An unaccompanied, monophonic liturgical chant.
Origin: After Saint Gregory I.