1. A significant or important finding that has considerable importance, impact, or magnitude
The archaeologists made a substantial discovery of ancient artifacts in the tomb.
Os arqueólogos fizeram uma descoberta substancial de artefatos antigos no túmulo.
2. In legal or academic contexts, a finding of considerable factual or evidentiary weight
The investigation revealed a substantial discovery that changed the course of the trial.
A investigação revelou uma descoberta substancial que mudou o curso do julgamento.