Idioms
An idiom is defined as - a group of words whose meaning is different from the meanings of the individual words.
Idiom:
mention (someone or something) in passing
Meaning:
to mention someone or something casually
Example:
I mentioned my friend in passing when I was talking to my father.
List of common idioms, their meanings and examples of their usage in sentences
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.