Outrider (noun)

1. A person who rides ahead of a group, especially in a procession or parade.
2. A horseman or woman who rides out in front of a hunt to find game.

Origin:

From the middle english 'outrider' meaning 'a person who rides out in front of a procession or company', which is derived from 'out' meaning 'outside' and 'ride' meaning 'to ride'. the term was first used in the late 16th century.

Examples:

1. The outrider led the parade through the streets on a horse.
2. The outrider signaled to the huntsman that he had spotted a fox in the woods.
3. The outrider was responsible for ensuring the safety of the procession.
4. The outrider was a skilled equestrian and a valued member of the team.
5. The outrider's job was to clear the way for the royal carriage.