leader

noun
  1. A person who leads or commands a group, organization, or country. noun
    The leader of the expedition made sure everyone was prepared for the journey.
    She was elected as the leader of the political party.
  2. A person or thing that leads in a certain field or area, often setting an example for others to follow. noun
    The company is a leader in technological innovation.
    He is a leader in the field of environmental science.
  3. A short length of material used to connect a fishing line to a hook or lure. noun
    He attached a leader to his fishing line to prevent it from breaking.
    Using a strong leader can help catch larger fish.
  4. A leading article in a newspaper or magazine. noun
    The leader in today's newspaper discussed the economic challenges facing the country.
    She wrote a compelling leader on climate change for the magazine.