Definition of "chatter mark" []

• A riblike marking on wood or metal, caused by vibration of a cutting tool. (noun)
• Geology One of a series of short scars made by glacial drift on a surface of bedrock. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.