ADJ
（体育中）保持不败的，未被打败过的
In sport, if a person or their performance is unbeaten, nobody else has performed well enough to beat them.
例句
He's unbeaten in 20 fights...
他20战全胜。
Sampdoria lost their unbeaten record with a 2-1 home defeat against Genoa.
桑普多利亚队主场1比2负于热那亚队之后，终止了自己的不败纪录。