Locative

As Paul says, it is really perfectly gratuitous ("es ist im grunde reine willkur") to call the case we have in German (and Old English) a dative, for besides the functions of the dative it fulfils the functions of the old locative, ablative, and instrumental.

Learning Turkish cannot be done without careful study of its case system or functions: nominative, genitive, accusative, dative, locative, ablative, and instrumental.

a locative adjective

the locative case of a noun

Brian: Ah. Ah, dative, sir! Ahh! No, not dative! Not the dative, sir! No! Ah! Oh, the… accusative! Accusative! Ah! Domum, sir! Ad domum! Ah! Oooh! Ah! Centurion: Except that domus takes the…? Brian: The locative, sir! Centurion: Which is…?!