Outrider

['aʊtraɪdə] or ['aʊtraɪdɚ]

(noun.) an escort who rides ahead (as a member of the vanguard).

Checker: Wayne--From WordNet

(n.) A summoner whose office is to cite men before the sheriff.

(n.) One who rides out on horseback.

(n.) A servant on horseback attending a carriage.

Typed by Catherine