külgsideid
Külgsideid is an Estonian-language term used in literary and media theory to refer to elements that accompany a primary narrative but are not essential to its main plot. These side elements may take the form of subplots, parallel perspectives, marginalia, or paratextual material that expand world-building, develop secondary characters, or offer alternative viewpoints.
The term is a compound of külg meaning “side” and sideid meaning “content” or “elements.” In contemporary
In practice, külgsideid appear across media. In novels, a main plot may be complemented by a diary
The use of külgsideid can enhance character development, foreshadow events, or create thematic contrast. They also
See also: Subplot, Paratext, World-building, Narrative technique.