In grammar, the prepositional case (abbreviated PREP) and the postpositional case (abbreviated POST) are grammatical cases that respectively mark the object of a preposition and a postposition. This term can be used in languages where nouns have a declensional form that appears exclusively in combination with certain prepositions. In the Pashto language, there also exists a case that occurs only in combination with certain prepositions. It is more often called the "first oblique" than the prepositional.