train

/treɪn/ noun

Definition

› [C] a long, thin vehicle which travels along metal tracks and carries people or goods: a train journey We could go by train. You'll have to catch/get the next train.

train of thought/events › a series of connected thoughts, ideas, or events which come or happen one after the other: I was interrupted and lost my train of thought.

(Definition of train noun from the Cambridge Learner's Dictionary © Cambridge University Press)