♦chiefs1) N-COUNT: with supp The chief of an organization is the person who is in charge of it.
...a commission appointed by the police chief.
...Putin's chief of security.2) N-COUNT; N-TITLE The chief of a tribe is its leader.
...Sitting Bull, chief of the Sioux tribes of the Great Plains.3) ADJ: ADJ n Chief is used in the job titles of the most senior worker or workers of a particular kind in an organization.
...the chief test pilot.Syn:4) ADJ: ADJ n The chief cause, part, or member of something is the most important one.
Financial stress is well established as a chief reason for divorce...
The job went to one of his chief rivals.Syn:main, principal
English dictionary. 2008.