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Meaning of choo-choo

choo-choo

Pronunciation: (ch'ch"), [key]
— n., v., -chooed, -choo•ing.
—n.
  1. a train.
  2. the sound of a steam locomotive.
—v.i.
  1. to make a sound like that made by a steam locomotive.
  2. to travel by train.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.