Idioms
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.
Idiom:
tie (someone's) hands
Meaning:
to prevent someone from doing something
Example:
The court system ties the police department's hands when they try to enforce some laws.
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