The event or events coming before and supporting the main event, as of boxing matches.(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.
Use "undercard" in a sentence
"In the main undercard event, Mexico's brilliant, young Saul "Danelo" Alvarez, 19, struggled in the first round, nearly going down, before coming back strong to stop Jose Miguel Cotto at 2: 51 of the ninth round."
"The LeBron vs. Rondo undercard is a bout they're ready to accept."
"Featured on the undercard is a bout between middleweight contenders Andy Lee of Ireland and Scotland's Craig McEwan, who wore kilts to the Times Square news conference."