from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The event or events coming before and supporting the main event, as of boxing matches.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A list of minor or supporting contests printed on the same bill as the main event (primarily fighting or racing, such as the main fight at a boxing match or wrestling, horse or car racing, etc.), occurring before or after the main event.
- n. The events so listed.
- n. A card lower than another given card or pair.
under + card. (Wiktionary)