1. to make a conclusion null, void, or without legal or logical force; to disprove or undermine the validity of a conclusion
The discovery of new evidence served to invalidate the original conclusion of the investigation.
A descoberta de novas evidências serviu para invalidar a conclusão original da investigação.
2. to demonstrate that a conclusion is based on flawed reasoning or insufficient data
The researcher's findings invalidate the conclusion that the drug was completely safe.
Os achados do pesquisador invalidam a conclusão de que o medicamento era completamente seguro.