(~s)
Frequency: The word is one of the 1500 most common words in English.
1.
The ~ of a car or other vehicle is the part that produces the power which makes the vehicle move.
He got into the driving seat and started the ~.
...an ~ failure that forced a jetliner to crash-land in a field.
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2.
An ~ is also the large vehicle that pulls a railway train.
In 1941, the train would have been pulled by a steam ~.
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