Source : Webster's Revised Unabridged Dictionary (1913)

Partitive \Par"ti*tive\, a. [Cf. F. partitif.] (Gram.)
   Denoting a part; as, a partitive genitive.

Partitive \Par"ti*tive\, n. (Gram.)
   A word expressing partition, or denoting a part.

Source : WordNet®

partitive
     adj 1: (Romance languages) relating to or denoting a part of a
            whole or a quantity that is less than the whole; "a
            partitive construction"
     2: indicating or characterized by or serving to create
        partition or division into parts; "partitive tendencies in
        education"
     3: serving to separate or divide into parts; "partitive
        tendencies in education"; "the uniting influence was
        stronger than the separative" [syn: {separative}]
     n : word (such a `some' or `less') that is used to indicate a
         part as distinct from a whole