chief
//tʃiːf//
Noun
chiefsPlural
1
A leader or ruler of a people or clan
The chief of the tribe made an important decision.
2
The person in charge of an organization, department, or group
She was appointed chief of the marketing department.
3
A senior officer in the police or fire department
The police chief announced new safety measures for the city.
Antonym
Adjective
1
Most important; principal or primary
Our chief concern is the safety of the children.
2
Highest in rank or authority
She is the chief executive of the company.