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:
spread like wildfire
Meaning:
to spread rapidly and without control
Example:
The panic over the bad drinking water spread like wildfire through the city.
List of common idioms, their meanings and examples of their usage in sentences
An idiom is a group of words, or in other words, a phrase that has a meaning other than its literal meaning of the words in it.