Connected series of railway carriages or wagons moved by a locomotive or by integral motors. Can also refer to a sequence of connected things or events.
From Old French trainer meaning 'to drag' or 'to draw', ultimately from Latin trahere. The railway sense developed in the 1820s from the idea of carriages being 'drawn' or 'dragged' behind a locomotive.
Trains revolutionized human civilization by shrinking perceived distances and standardizing time itself - before railways, each town kept its own local time, but train schedules necessitated the creation of time zones. The psychological impact was profound: trains made the world feel both larger (by revealing distant places) and smaller (by making them accessible).
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