adessive case

An adessive case (abbreviated ade; from Latin adesse "to be present (at)": ad "at" + esse "to be") is a grammatical case generally denoting location at, upon, or adjacent to the referent of the noun; the term is used most frequently for Uralic studies. For Uralic languages, such as Finnish, Estonian and Hungarian, it is the fourth of the locative cases, with the basic meaning of "on"—for example, Estonian laud (table) and laual (on the table), Hungarian asztal and asztalnál (at the table). It is also used as an instrumental case in Finnish.

For Finnish, the suffix is -lla/-llä, e.g. pöytä (table) and pöydällä (on the table). In addition, it can specify "being around the place", as in koululla (at the school including the schoolyard), as contrasted with the inessive koulussa (in the school, inside the building).