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:
check out (of a motel/hotel)
Meaning:
to pay the bill at a motel or hotel and then leave
Example:
We ate breakfast and then we checked out of the hotel.
List of common idioms, their meanings and examples of their usage in sentences
An idiom is a widely used saying or expression containing a figurative meaning that differs from the phrase's literal meaning.