The Collaborative International Dictionary
Oppositive
Oppositive \Op*pos`i*tive\, a. [Cf. F. oppositif. See
Opposite.]
Capable of being put in opposition.
--Bp. Hall.
Wiktionary
oppositive
a. Expressing contrariety.
WordNet
oppositive
adj. expressing antithesis or opposition; "the adversative conjunction `but' in `poor but happy'" [syn: adversative]