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:
show one's cards/hand
Meaning:
to disclose one`s plans
Example:
The buyer will not show us his cards so we do not know what he wants.
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