train set

plural train sets

1. A toy consisting of one or more miniature model trains and the tracks, equipment, scenery, etc. that go with them.

   It has its charms though. Royal Oak is like a country branch line dropped down amid the main line approaches to Paddington. It's as if two very different train sets got mixed up in the same box.

   2012, Andrew Martin, Underground Overground: A passenger's history of the Tube, Profile Books, →ISBN, page 50

2. alternativeAlternative form of trainset.

   To me it seems that extensive investment in relatively low-powered units may have the same ultimate result of motive power shortage as that which afflicts the London Midland Region today, and which has compelled the re-engining of some of the earlier multiple-unit diesel train sets.

   1958 June 28, Cecil J. Allen, “British Locomotive Practice and Performance”, in Railway Magazine, page 412

   1 more example

   In a review of operating experience with the Southern Region diesel-electric multiple-units on the Hastings line, read to the Institution of Locomotive Engineers in October, Mr. W. J. A. Sykes, Mechanical & Electrical Engineer of the S.R., revealed how the somehat unprepossessing appearance of these train sets came about.

   1960 December, “The Hastings Line diesel-electric multiple units”, in Trains Illustrated, page 732