The Collaborative International Dictionary of English v.0.48:

Accusative \Ac*cu"sa*tive\, a. [F. accusatif, L. accusativus (in
   sense 2), fr. accusare. See Accuse.]
   [1913 Webster]
   1. Producing accusations; accusatory. "This hath been a very
      accusative age." --Sir E. Dering.
      [1913 Webster]

   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.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Accusative \Ac*cu"sa*tive\, n. (Gram.)
   The accusative case.
   [1913 Webster]

WordNet (r) 3.0 (2006):

accusative
    adj 1: containing or expressing accusation; "an accusitive
           forefinger"; "black accusatory looks"; "accusive shoes
           and telltale trousers"- O.Henry; "his accusing glare"
           [syn: accusative, 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 1: the case of nouns serving as the direct object of a verb
         [syn: accusative, accusative case, objective case]