Types of Diction Diction is word choice. If a vocabulary is a list of words available for use, then good diction is the careful selection of those words to communicate a particular subject to a specific audience.
formal scholarly books and articles
informal essays in popular magazines
colloquial conversations between friends, including newly coined words and expressions
slang language shared by certain social groups
dialect language typical of a certain region, race, or social group
Technical/jargon words that make up the basic vocabulary of a specific area of study, such as medicine or law
obsolete words no longer in use