In the time of the Roman Empire, a gladiator was a man who had to fight against other men or wild animals in order to entertain an audience.
N-COUNT
勇士，斗士（指勇敢的或表演危險動作的運動員或表演者）
You can refer to a sports player or a performer as a gladiator in order to emphasize how brave or dangerous their actions are.
例句
As the gladiators rolled away from the starting gates, a gasp went up when the Scottish cyclist's left foot clicked out of the pedal.矯健的自行車手們紛紛騎車沖出起跑門，突然蘇格蘭選手的左腳咔嗒一聲踩空了踏板，觀眾不禁倒抽了一口冷氣。
英漢詞典釋義
n.
<史>斗劍士,格斗士
a sword-touting Roman gladiator佩劍的角斗士
英英詞典釋義
Noun
1. (ancient Rome) a professional combatant or a captive who entertained the public by engaging in mortal combat