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:
blow the whistle (on someone)
Meaning:
to report someone's wrongdoing to the police or other authorities
Example:
The employee blew the whistle on the illegal practices of the company.
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.