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:
heart-to-heart
Meaning:
honest or intimate
Example:
The couple had a heart-to-heart talk before they decided to get married.
List of common idioms, their meanings and examples of their usage in sentences
The language peculiar to a people or to a district, community, or class