Pronunciation: (chOO'chOO"), [key]
—n., v., -chooed, -choo•ing. Baby Talk.
1. a train.
2. the sound of a steam locomotive.
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.