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:
walk away with (something)
Meaning:
to take something and go away with it, to steal something
Example:
Somebody walked away with the computer from the library last night.
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.