Definition of auto-train in English:

auto-train

Pronunciation /ˈɔːtəʊtreɪn/

See synonyms for auto-train

noun

US
  • 1Railways
    Also with capital initials. A train which transports motor cars together with their drivers and passengers; a rail service of this type.

    A trademark in the United States.

  • 2rare A road vehicle consisting of a series of linked trailers or passenger cars pulled by a lorry or other motor vehicle. Compare "road train".

Origin

Early 20th century (in an earlier sense). From auto + train.