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:
march to (the beat of) a different drummer
Meaning:
to believe in a different set of principles than most other people
Example:
My friend marches to the beat of a different drummer although he does what he thinks is the right thing to do.
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.