Idioms
An idiom is a group of words, or in other words, a phrase that has a meaning different from the literal meaning of the words in it.
Idiom:
in black and white
Meaning:
in writing
Example:
I want to see the proposal in black and white before I go to the meeting.
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