In linguistics, the relationship between elements that can substitute for each other in a given context, as opposed to syntagmatic (統合) relations. Often discussed in structuralist semantics.
See also: 統合関係
"Hashiru" (run) and "aruku" (walk) are in a paradigmatic relation.
Paradigmatic and syntagmatic relations are the two fundamental axes of language.
統合関係 refers to syntagmatic relations (how words combine in sequence), while 系列関係 refers to paradigmatic relations (how words can substitute for each other).
Compound of 系列 (series, system) and 関係 (relation). The term is a direct translation of the linguistic concept 'paradigmatic relation'.