Definitions

1. noun

A groom or a team of grooms who ride at the front of a horse-drawn carriage to guide the horses and control the speed of the carriage.

“The postilion team guided the royal carriage through the crowded streets.”

2. verb

To ride at the front of a horse-drawn carriage, guiding the horses and controlling the speed of the carriage.

“The king’s postilion rode at the front of the carriage to ensure a smooth journey.”