1. A person or thing that is leading in a race, competition, or election
She is the frontrunner for the presidential election.
Ela é a favorita para a eleição presidencial.
2. Someone or something that is ahead of others in development or progress
This company is a frontrunner in renewable energy technology.
Esta empresa é líder em tecnologia de energia renovável.
3. A competitor who is in the lead position during a race or competition
The frontrunner maintained his lead throughout the marathon.
O líder manteve sua vantagem durante toda a maratona.