Arranged, regular combat between two private persons, often over a matter of honor.
Historically, the wager of battle (judicial combat).
Any battle or struggle between two contending persons, forces, groups, or ideas.
To engage in a battle.
A competition that narrows a field of contestants (semifinalists) to a set of finalists, for a subsequent final.
A playoff in the round with only four players or teams left, the stage before the final.