Princeton's WordNet
slip coach, slip carriage(noun)
a railway car at the end of the train; it can be detached without stopping the train
Synonyms:
slip coach, slip carriage
Wiktionary
slip coach(noun)
Synonyms:
slip carriageslip coach(noun)
A coach at the end of a long-distance train which carries passengers for an intermediate destination and is decoupled or slipped and left behind. (In bygone times the decoupling was done on the move; the rest of the train did not stop.)Synonyms:
slip carriage
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