1. a person who organizes and directs the movement or arrangement of people, vehicles, or things in an orderly manner
Usage: commonly used in event management, traffic control, and military contexts
2. a railroad worker who arranges and couples railroad cars in a rail yard
Usage: chiefly North American; also called a switchman or yard worker
3. a law enforcement officer or official who maintains order and directs traffic or crowds
Usage: used in contexts such as parades, sporting events, or courtrooms

Examples

• The marshaller directed the parade participants into their correct positions.
• Airport marshallers guided the aircraft to the gate using hand signals.
• A marshaller at the golf tournament ensured spectators stayed behind the ropes.
• The railroad marshaller coupled the freight cars together in the yard.
• Event marshallers helped organize the crowd flow at the concert venue.
• The court marshaller announced the judge's arrival.
• Parking lot marshallers directed vehicles to available spaces during the festival.