Chief | Mean of chief in English Dictionary

/ˈtʃiːf/

• Noun
• the person who is the leader of a group of people, of an organization, etc.
1. She's the chief of surgery [=the doctor who is in charge of the surgical department] at the hospital.
2. the police chief = the chief of police
3. the fire chief [=the head of a department of firefighters]
4. an Indian chief [=the leader of a tribe of Native Americans]
• highest in rank or authority
1. the chief engineer on the project
2. the company's chief executive
• most important
1. Her job is their chief source of income.
2. their chief accomplishment
3. our chief competitor
4. He has many concerns, chief among them his health.