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.

To smoke cannabis.

Primary; principal.

“Negligence was the chief cause of the disaster.”

Intimate, friendly.