Accusative case
The accusative case of a noun is the case used to mark the direct object of a verb. The same case is used in many languages for the objects of (some or all) prepositions.
The accusative case exists (or existed once) in all the Indo-European languages (including Latin, Sanskrit, Greek, German, Russian), and the Finno-Ugric languages.
English, which lacks declension in its nouns, has an explicitly marked accusative case in a few pronouns. "Whom" is the accusative case of "who"; "him" is the accusative case of "he"; and "her" is the accusative case of "she". (These words also serve as the dative case pronouns in English; see Declension in English.)
See also
Nominative case, dative case, ergative case, genitive case, instrumental case, vocative case, ablative case, declension