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:
a law unto oneself
Meaning:
someone who makes one's own laws or rules
Example:
The city council member was a law unto herself until she had to quit because of a scandal.
List of common idioms, their meanings and examples of their usage in sentences
A group of words which have a different meaning when used together from the one they would have if you took the meaning of each word separately.