The definition of an undercard is a boxing event before the main match.
An example of an undercard is a match between two lesser known boxers before a heavy weight championship match.
Boxing the match or matches before the main event
The event or events coming before and supporting the main event, as of boxing matches.
- 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.
- The events so listed.
- (poker) A card lower than another given card or pair.
- The eight on the turn was another undercard to her pair of nines