A leader or head of a group of people, organisation, etc.
All firefighters report to the fire chief.
The top part of a shield or escutcheon; more specifically, an ordinary consisting of the upper part of the field cut off by a horizontal line, generally occupying the top third.
The principal part or top of anything.
An informal term of address, sometimes ironic.
Hey, chief.
To smoke cannabis.
Primary; principal.
Negligence was the chief cause of the disaster.
Intimate, friendly.