'mail car' definitions:
Definition of 'mail car'
From: WordNet
noun
A railway car in which mail is transported and sorted
Definition of 'mail car'
From: GCIDE
- 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]