* Noun: When referring to the choice and use of words in speech or writing.
* Example: "The speaker's diction was formal and eloquent."
* Adjective: When describing something related to the choice of words.
* Example: "The play's diction was poetic and rich in imagery."
Let me know if you have a specific sentence in mind, and I can help you determine the part of speech for "diction" in that context!