1
- a person who has defeated or surpassed all rivals in a competition, especially a sporting contest冠军：
as modifier a champion hurdler.跨栏冠军。
2
- a person who fights or argues for a cause or on behalf of another斗士; 提倡者; 捍卫者：
a champion of financial probity.
财政清廉的提倡者。
2.1
- historical a knight who fought in single combat on behalf of the monarch〈史〉（代表君主出战的）骑士。
- Brit. informal or dialect excellent〈英, 非正式或方〉出众的; 极好的：
'Thank ye, lad, ' the farmer said. 'That's champion.'
“谢了, 小伙子,"农夫说, “那太棒了。”
- Brit. informal or dialect very well〈英, 非正式或方〉很好地; 非常妥善地; 非常令人满意地：
those slacks'll do champion.
那条休闲裤会很合适的。
词源
Middle English (denoting a fighting man)： from Old French， from medieval Latin campio（n-） 'fighter'， from Latin campus （see CAMP1）.