- the language or dialect of a people, region, class, etc.
- the usual way in which the words of a particular language are joined together to express thought
- a phrase, construction, or expression that is recognized as a unit in the usage of a given language and either differs from the usual syntactic patterns or has a meaning that differs from the literal meaning of its parts taken together (Ex.: not a word did she say; she heard it straight from the horse's mouth)
- the style of expression characteristic of an individual: the idiom of Hemingway
- a characteristic style, as in art or music
Origin of idiomfrom French and LL: French idiome from Late Latin idioma from Classical Greek idi?ma, peculiarity, idiom from idios: see idio-