outrider
/ˈaʊtˌraɪdə(r)/noun
1- a person in a motor vehicle or on horseback who goes in front of or beside a vehicle as an escort or guard（车辆的）摩托车警卫; 骑马侍从。
1.1
- US a mounted official who escorts racehorses to the starting post〈美〉把赛马护送到起跑线上的骑马官员。
1.2
- US a mounted herdsman who prevents cattle from straying beyond a certain limit〈美〉骑马牧人。
派生词