What does accusative mean?
The definition of accusative
Ac*cu”sa*tive, a.
Etym: [F. accusatif, L. accusativus (in sense 2), fr. accusare. See Accuse.]

1 Producing accusations; accusatory. “This hath been a very accusative age.” Sir E. Dering.
2 (Gram.)
Applied to the case (as the fourth case of Latin and Greek nouns) which expresses the immediate object on which the action or influence of a transitive verb terminates, or the immediate object of motion or tendency to, expressed by a preposition. It corresponds to the objective case in English.

Ac*cu”sa*tive, n. (Gram.)
The accusative case.