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:
look out for (someone or something)
Meaning:
to be alert or watchful for someone or something, to keep looking for someone or something
Example:
"Could you please look out for any old vinyl records that you may find."
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