Source : Webster's Revised Unabridged Dictionary (1913)

Accusative \Ac*cu"sa*tive\, a. [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.

Accusative \Ac*cu"sa*tive\, n. (Gram.)
   The accusative case.

Source : WordNet®

accusative
     adj 1: containing or expressing accusation; "an accusitive
            forefinger"; "black accusatory looks"; "accusive shoes
            and telltale trousers"- O.Henry; "his accusing glare"
            [syn: {accusatory}, {accusing}, {accusive}]
     2: serving as or indicating the object of a verb or of certain
        prepositions and used for certain other purposes;
        "objective case"; "accusative endings" [syn: {objective}]

accusative
     n : the category of nouns serving as the direct object of a verb
         [syn: {accusative case}, {objective case}]