1. occurring between or involving different leagues, especially in sports
Usage: commonly used in baseball and other professional sports contexts

Examples

• The interleague games between the American League and National League are popular with baseball fans.
• Interleague play was introduced to Major League Baseball in 1997.
• The team's interleague schedule includes matchups against teams from the other conference.
• Interleague competitions allow players from different leagues to compete against each other.
• The interleague rivalry between the two sports organizations has grown over the years.