rinkiniais

Rinkinys (plural rinkiniai) is a Lithuanian noun meaning a set, collection, or kit—a group of items treated as a single unit. The word stems from the verb rinkti, meaning to collect, with the suffix -inys that forms nouns indicating an assembled or grouped thing. In everyday usage, rinkiniai often refer to complete sets of items offered or used together, such as clothing sets, kitchen utensil sets, or gift sets, and can describe any bundle designed to be used as a unit.

In mathematics and logic, rinkiniai is the standard term for sets. A rinkinys is a collection of objects defined by a shared property or rule, and rinkiniai form the basis of set theory. Texts on the subject discuss concepts such as membership, subsets, and other basic operations that relate to how sets interact.

Grammatically, rinkiniai is the nominative plural of the noun rinkinys. Its instrumental plural form is rinkiniais, used to express means, accompaniment, or manner in sentences requiring the instrumental case (for example, su rinkiniais, “with sets”). Other forms follow standard Lithuanian declension patterns, changing to reflect case and number in sentence structure.

The term is widely used across domains, from commerce and consumer packaging to education and science, reflecting both tangible groupings of physical items and abstract collections in mathematical discourse.