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:
cover a lot of ground
Meaning:
to deal with much information or facts, to travel a great distance
Example:
We covered a lot of ground in our history class at school.
List of common idioms, their meanings and examples of their usage in sentences
An idiom is a type of phrase or expression that has a meaning that can't be deciphered by defining the individual words.