perustuslaatuiseen

Perustuslaatuinen is a Finnish adjective meaning "constitutional" or "relating to the constitution." It is formed from the concept of perustuslaki (the constitution) combined with the suffix -laatuinen, which signals a quality or type. The term is primarily found in linguistic, philosophical, and some legal contexts to describe ideas, institutions, or interpretations that are grounded in or aligned with constitutional principles.

In practice, perustuslaatuinen is used to discuss whether a given political or legal arrangement corresponds to or embodies the ideals and requirements of a constitution. It is less common in everyday language, where terms like perustuslaillinen or phrases such as perustuslakiin perustuva are more typical for indicating constitutional compliance or basis.

The illative form perustuslaatuiseen can occur in sentences requiring the "into a constitutional [something]" form, for example in phrases describing aiming toward a perustuslaatuiseen järjestykseen (a constitutional order). The word also appears in inflected variants to fit different grammatical contexts.

Related terms include perustuslaki (the Constitution), perustuslaillinen (constitutional in the sense of aligned with constitutional norms), and phrases such as perustuslakiin perustuva (based on the Constitution). While perustuslaatuinen conveys a broad sense of constitutionality, its use is often more specialized and nuanced than that of the more common perustuslaillinen. See also Finnish constitutional law and related linguistic usage in theoretical discussions.