leader

noun
A2
OPAL
1
A2
a person who leads a group of people, especially the head of a country, an organization, etc.
رهبر, رهبر گروه
see also floor leader, majority leader, minority leader, squadron leader, thought leader
2
B1
a person or thing that is the best, or in first place in a race, business, etc.
رهبر, پیشگام
She was among the leaders of the race from the start.
The company has emerged as a world leader in the field of precision engineering.
see also loss-leader, market leader
3
the most important violin player in an orchestra
کنسرت مایستر, سَر نوازنده
4
an important article in a newspaper that expresses the editor's opinion about an item of news or an issue; in the US also a comment on radio or television that expresses the opinion of the station or network
سرمقاله, یادداشت سردبیر, دیدگاه سردبیر