Designating a case of nouns and pronouns (and adjectives in grammatical agreement with them) in Finnish and a number of other languages, expressing position on or near something, and a variety of other relationships, such as possession or instrumentality; (of a linguistic form) forming, relating to, or in this case.
Originally with reference to Finnish and other Finno-Ugric languages, and subsequently to other Uralic languages and sometimes more widely.
The adessive case; a linguistic form denoting or in this case.
Mid 19th century; earliest use found in Charles MacFarlane (1799–1858), historian and traveller. From classical Latin adesse to be present (from ad- + esse to be) + -ive, after German adessiv or French adessif.