Definitions

1. noun

a person who directs traffic at a roadwork or other site, often by holding a flag or light to indicate when it is safe to proceed.

“The flagman at the construction site waved his flag to signal the truck to proceed.”

2. noun

a person who signals or directs the movement of a ship or a group of people, often with a flag.

“The flagman aboard the ship helped guide the vessel through the narrow waterway.”