A memoir is any nonfiction narrative writing based on the author's personal memories. The assertions made in the work are thus understood to be factual. While memoir has historically been defined as a subcategory of biography or autobiography since the late 20th century, the genre is differentiated in form, presenting a narrowed focus, usually a particular time phase in someone's life or career. A biography or autobiography tells the story "of a life", while a memoir often tells the story of a particular career, event, or time, such as touchstone moments and turning points in the author's life. The author of a memoir may be referred to as a memoirist or a memorialist.

A narrative, story, or tale is any account of a series of related events or experiences, whether nonfictional or fictional. Narratives can be presented through a sequence of written or spoken words, through still or moving images, or through any combination of these. The word derives from the Latin verb narrare, which is derived from the adjective gnarus. The formal and literary process of constructing a narrative—narration—is one of the four traditional rhetorical modes of discourse, along with argumentation, description, and exposition. This is a somewhat distinct usage from narration in the narrower sense of a commentary used to convey a story. Many additional narrative techniques, particularly literary ones, are used to build and enhance any given story.