noun
choo
choo
noun
1
A sound imitating a train whistle or the chugging of a steam locomotive.
"The toy train went "choo choo" as it circled the track."
How to Use Choo
Learner’s notesIn plain EnglishA playful word imitating a train sound, as in "choo-choo train."
Common pairings
choo-choo train
Word Forms
choos plural, Choos plural
Study it as flashcards or scroll it in Flow — saved to your collection.
Test yourself on “choo”
A quick quiz — meaning, synonyms & usage
→
Fill the Gap
Can you complete this real example?
The toy train went "_____ choo" as it circled the track.
Etymology
An imitative (onomatopoeic) word representing the sound of a train.