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.
in receipt of (something)
having received something
I am in receipt of an order from the city to cut down a tree in our backyard.
List of common idioms, their meanings and examples of their usage in sentences
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.