Idioms
An idiom is a type of phrase or expression that has a meaning that can't be deciphered by defining the individual words.
Idiom:
let (someone) off
Meaning:
to permit someone to leave a car or train or boat or plane or other transportation
Example:
The train stopped at a small town and let the young woman off.
List of common idioms, their meanings and examples of their usage in sentences
An idiom is a group of words, or in other words, a phrase that has a meaning other than its literal meaning of the words in it.