1. as much as a train can hold or carry; a train’s full capacity of passengers or cargo

Examples

• A trainful of commuters arrived at the station during rush hour.
• The freight train carried a trainful of coal to the power plant.
• Every morning, a trainful of students travels to the university.
• The holiday season brought trainful after trainful of shoppers to the city.
• The cargo ship was loaded with a trainful of grain for export.
• A trainful of tourists visited the national park last weekend.