on-train adjective2 •Taking place on a train.Cost analysis revealed that on-train catering lost money and Travellers Fare, the BR division that dealt with all the railway's catering, commissioned consultants to report on options. — 2020 •Aboard or fitted to a train.These agents are members of rail staff who have been trained by RAIB to gather and safeguard evidence such as on-train monitoring and recording equipment. — 2021
