1. a person or team that shares a championship title with one or more others
Usage: often used in sports contexts

Examples

• The two schools were declared cochampions after the tournament ended in a tie.
• She became a cochampion of the debate competition alongside her rival.
• The basketball teams finished with identical records and were named cochampions of the league.
• He shared the title of cochampion with three other competitors.
• The cochampions celebrated their shared victory on the podium.