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:
a fine-toothed/tooth comb
Meaning:
a very careful check of something
Example:
We went over the apartment with a fine-toothed comb but I could not find my keys.
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