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:
at (someone's) beck and call
Meaning:
to be always ready to serve someone or do something for someone
Example:
The woman is always at her husband's beck and call.
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