leader
US /ˈliː.dɚ/
UK /ˈliː.dɚ/

1.
leader, chef, dirigeant
the person who leads or commands a group, organization, or country
:
•
The team's leader motivated everyone to work harder.
Le leader de l'équipe a motivé tout le monde à travailler plus dur.
•
She was elected as the new party leader.
Elle a été élue nouvelle dirigeante du parti.
2.
leader, pionnier
a person or thing that is the best or most successful in a particular field
:
•
This company is a market leader in renewable energy.
Cette entreprise est un leader du marché dans les énergies renouvelables.
•
He's considered a thought leader in his industry.
Il est considéré comme un leader d'opinion dans son industrie.