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:
in one's good books/graces
Meaning:
approved of by someone, liked by someone
Example:
I am in my friend's good books after helping her with her homework last month.
List of common idioms, their meanings and examples of their usage in sentences
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.