Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
Slang something, esp. a closely contested sports event, that is very exciting, intense, dramatic, etc.
Used by arrangement with John Wiley & Sons, Inc.
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.
An extremely impressive event or successful outcome: “September will not be any barnburner [for car sales]” (Lee Iacocca).