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:
turn on (someone)
Meaning:
to suddenly become hostile to someone
Example:
My coworker used to be my friend but he suddenly turned on me last summer.
List of common idioms, their meanings and examples of their usage in sentences
An idiom is defined as - a group of words in a fixed order that has a particular meaning that is different from the meanings of each word on its own.