päällekkäisellä

Päällekkäisellä is the adessive singular form of the Finnish adjective päällekkäinen, meaning overlapping or superimposed. It is used to describe a noun in the adessive case, indicating that something lies on top of, coincides with, or overlaps another thing. The form signals spatial, temporal, or conceptual overlap within a sentence.

In Finnish, adjectives agree with the nouns they modify in case and number. Therefore päällekkäisellä appears in phrases where the noun is in the adessive case, for example päällekkäisellä alueella (on an overlapping area) or päällekkäisellä ajanjaksolla (during an overlapping time interval). The word is common in technical and descriptive contexts such as geography, scheduling, design, data analysis, and linguistics, where it helps to specify that two features, events, or signals coincide or share space.

Usage notes:

- päällekkäisellä describes something that overlaps another feature described by a following noun in adessive.

- It is typically part of a larger phrase rather than a standalone noun.

- The related noun päällekkäisyys refers to the concept of overlap, while päällekkäinen is the basic form of the adjective.

See also:

- päällekkäisyys, overlap

- päällekkäinen, overlapping

Examples:

- Kohde sijaitsee päällekkäisellä alueella kartalla.

- Aikataulu on päällekkäisellä ajanjaksolla, jolloin tapahtumat osuvat päällekkäin.

Päällekkäisellä thus functions as a grammatically specific way to express overlap in Finnish, signaling that the described attribute applies to something located on or during an overlap.