An expression in the usage of a language that is peculiar to itself either in having a meaning that cannot be derived from the conjoined meanings of its elements or in its grammatically atypical use of words.
Idiom:
pan out
Meaning:
to end or finish favorably, to work out well
Example:
"I hope that your plans to go back to school pan out."
List of common idioms, their meanings and examples of their usage in sentences
The language peculiar to a people or to a district, community, or class