Meaning of “train” - Learner’s Dictionary

train

noun us uk /treɪn/
There's a train at 6.15 and one at 10.30 but nothing in between.Thanks to John, we missed the train.The train was completely empty when it reached London.The train got in at exactly ten o'clock.The train drew into the station.

A1 [ C ] a long, thin vehicle that 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 that 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)