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 a mouthful
Meaning:
to say something of great importance/meaning/length
Example:
"You certainly said a mouthful," I said when my friend began to tell me about his complaint.
List of common idioms, their meanings and examples of their usage in sentences
Idioms can be a powerful linguistic tool only when they are used in the right way in the right places.