/ Dictionary / Index C choo-choo: Meaning and Definition of Find definitions for: choo-choo Pronunciation: (ch'ch"), [key] — n., v., -chooed, -choo•ing. —n. a train. the sound of a steam locomotive. —v.i. to make a sound like that made by a steam locomotive. to travel by train. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: choo-choo (Thesaurus) Chonju chook Related Content Daily Word Quiz: wizened Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language