chief · adjective always before noun /tʃiːf/
chief (MOST IMPORTANT)
B2 most important or main
Dictionary examples:
The chief problem we have in the area now is the spread of disease.
The weather was our chief reason for coming here.
Learner example:
This is the chief argument of those who do not agree with zoos. (First Certificate in English; B2; Portuguese)
chief (HIGHEST IN RANK)
B2 highest in rank
Dictionary example:
He is the chief economic adviser to the government.
Learner example:
Bob Wilson, the chief accountant, had resigned. (First Certificate in English; B2; Greek)
chief · noun C /tʃiːf/
chief
B2 the person in charge of a group or organization
Dictionary examples:
a police chief
A new chief of the security forces has just been appointed.
Learner example:
I saw her one day, and she [told] me that she had been promoted to chief of section. (First Certificate in English; B2; Spanish)