Read the dictionary definition of idiom. All definitions for this word.
1. the style of a particular artist or school or movement
1. an imaginative orchestral idiom
2. a manner of speaking that is natural to native speakers of a language
3. an expression whose meanings cannot be inferred from the meanings of the words that make it up
4. the usage or vocabulary that is characteristic of a specific group of people
1. the immigrants spoke an odd dialect of English
2. he has a strong German accent
3. it has been said that a language is a dialect with an army and navy