The Word 'IDIOM'

Idiom (noun)

definition:
the style of a particular artist or school or movement

example:
"an imaginative orchestral idiom"

Idiom (noun)

definition:
a manner of speaking that is natural to native speakers of a language

Idiom (noun)

definition:
an expression whose meaning cannot be inferred from the meanings of the words that make it up

example:
"The English language is full of interesting idioms. "

Idiom (noun)

definition:
the usage or vocabulary that is characteristic of a specific group of people