*A writer's or speaker's choice of words, phrases, and figurative language, in speech or writing. Intentional combinations for effect and to help create meaning and tone.
*A speaker or writer's choice of words (formal, informal, colloquial, full of slang, poetic, ornate, plain, abstract, concrete, etc.); diction has a powerful effect on tone
***Related to style, diction refers to the writer's word choices, especially with regard to their correctness, clearness, or effectiveness. FOR AP EXAMS, you should be able to describe the author,s diction and understand how it compliments his purpose (along with imagery, syntax, literary devices, etc)