Found 2 items, similar to mail car.
English → English (WordNet) Definition: mail car mail car n : a railway car in which mail is transported and sorted
English → English (gcide) Definition: mail car mail car \mail car\ n. A railway car of special design used for the transportation and sorting of mail en route to its destination, and having employees of the post office inside to perform those functions. [WordNet 1.5 +PJC]