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:
say (something) under one's breath
Meaning:
to say something so softly that almost nobody can hear it
Example:
The woman said something under her breath but I could not understand it.
List of common idioms, their meanings and examples of their usage in sentences
Idioms are phrases which cannot be understood simply by looking at the meaning of the individual words in the phrase.