mail car
- noun
- Archaic
- The crew sorted letters in the mail car while the train traveled across the countryside.
Examples
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"'I will never be big enough to pull anything but silly old mail cars,'... ...sobbed Huffy."
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Mail car 2105.
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During the trip, we passed an old mail car filled with packages ready for delivery.
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The train included a mail car specifically designed for transporting and sorting mail.
Surface Forms
Morphology
The meaning 'a railway car for transporting and sorting mail' is directly and transparently built from the constituents 'mail' (postal items) + 'car' (rail vehicle); the compound simply names the vehicle used for mail. This noun+noun compositional pattern is common and cross-linguistically obvious, so a B1 learner who knows both words will readily infer the MWE's meaning.
Etymology
The noun mail car comes from old trains: it was a car where workers sorted mail while the train moved. They even used a long hook to catch and drop mail bags without stopping, so the name now means 'a train car for carrying and sorting mail'.