1. Adjective describing something that is so significant or important that it marks the beginning of a new period or era; groundbreaking or revolutionary
The invention of the internet was an epoch-making achievement in human history.
A invenção da internet foi uma conquista marcante na história da humanidade.
2. Having the power to mark a division in history or to change the course of events fundamentally
The discovery was epoch-making because it changed scientific understanding forever.
A descoberta foi de grande importância histórica porque mudou para sempre a compreensão científica.