1. a ship designed to carry railroad cars or trucks across water
Usage: nautical

Examples

• The seatrain transported freight cars across the English Channel.
• Loading the railroad cars onto the seatrain took several hours.
• The company operated a seatrain service between the mainland and the island.
• Trucks and trailers were loaded onto the seatrain for the overnight crossing.
• The seatrain could carry up to 50 railroad cars per voyage.
• Maritime regulations required special safety equipment on the seatrain.