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:
head for (someone/something/somewhere)
Meaning:
to aim for someone/something/somewhere, to move toward someone/something/somewhere
Example:
The tropical storm is heading for the large island. The dog in the park was heading for the woman.
List of common idioms, their meanings and examples of their usage in sentences
Idioms can be a powerful linguistic tool only when they are used in the right way in the right places.