The Superessive case is a grammatical declension indicating location on top of something. (Its name comes from Latin supersum, superesse: to be over and above.)

While most languages communicate this concept through the use of prepositions, there are some (most notably the family of Finno-Ugric_languages which includes Finnish and Hungarian) which make use of cases for this grammatical structure.

An example in Hungarian: a könyveken means "on the books", literally "the books (on)"