noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A locomotive and carriages coupled together to form a unified set of equipment.
2. 2
   a self-propelled electric or diesel multiple unit, consisting of a fixed number of permanently coupled passenger vehicles.

Etymology

From train + set.

Related phrases

multiple unitself propelled

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.