Idioms
An idiom is a widely used saying or expression containing a figurative meaning that differs from the phrase's literal meaning.
Idiom:
know which is which
Meaning:
to be able to distinguish one thing or person from another
Example:
The two dogs look the same and I do not know which is which.
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