Idioms
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.
Idiom:
at the expense of (someone or something)
Meaning:
to be to the harm of (someone or something)
Example:
The man was very successful but it was at the expense of his family and health.
List of common idioms, their meanings and examples of their usage in sentences
Idioms are phrases which cannot be understood simply by looking at the meaning of the individual words in the phrase.