Definition of opinative in US English:

opinative

adjective

  • Of the nature of, or expressing, an opinion; founded on opinion; conjectural, uncertain.

Origin

Late Middle English. From Middle French opinatif, opinative relating to opinion, presumptuous and its etymon post-classical Latin opinativus expressing a conjecture from classical Latin opīnāt-, past participial stem of opīnārī + -īvus. Compare Italian opinativo.

Pronunciation

opinative

/ˈɒpɪnətɪv/