What dose cap mean in rugby?

In Rugby, a "cap" refers to a player's selection for a national team, symbolizing their participation in an international match. Each time a player represents their country in a game, they earn a cap, which serves as a measure of their experience and contributions at the international level. The term originates from the practice of awarding players a physical cap for each game played. Caps are often used to track and highlight a player's achievements in their rugby career.