Idioms
An idiom is defined as - a group of words whose meaning is different from the meanings of the individual words.
Idiom:
drop out of (something)
Meaning:
to quit school or a course of some kind
Example:
The boy dropped out of the class after three months.
List of common idioms, their meanings and examples of their usage in sentences
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.