n.
1.a manner of speaking that is natural to native speakers of a language
2.the usage or vocabulary that is characteristic of a specific group of people
3.the style of a particular artist or school or movement
4.an expression whose meanings cannot be inferred from the meanings of the words that make it up
Idiom of the Day
keep one's word
to fulfill or keep one`s promise
The girl never keeps her word and will probably not come to the party as she said.