Definition of "choo-choo" [choo-choo]

• Informal A locomotive train. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "But at least pronounce them with the "h" sound rather than the "ch" sound as in Cheney or choo-choo."
• "Mango-fried pawpaws reminded Jones of Africa -- of choo-choo trains, black nationalists, and wounded lions twitching in the bush."
• "Visions were conjured of the back yard of 10 Downing Street... the two Brown toddlers playing choo-choo trains with the two Murdoch boys some thirty years older all four boys in short trousers -- while daddies Rupert and Gordon sat enjoying a glass of Australian Chardonnay and discussing details of Britain's debt crisis."