1. A conclusive, final, or authoritative response that settles a question or matter completely
The judge's ruling provided the definitive answer to the legal dispute.
A sentença do juiz forneceu a resposta definitiva para a disputa legal.
2. An answer that is not subject to further debate or modification
Scientists are still searching for a definitive answer about the origins of the universe.
Os cientistas ainda estão procurando uma resposta definitiva sobre as origens do universo.