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:
golden opportunity
Meaning:
an excellent and rare opportunity
Example:
The hot weather was a golden opportunity for the ice cream seller to make money.
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 different from the literal meaning of the words in it.