noun

• (uncountable, only with "in") Headship, the status of being a chief or leader.
  "Bob is our troubleshooter in chief."
• (heraldry) 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.
  "When the Chief is Charged with any figure, in blazon it is said to be "On a Chief"."
• (sometimes ironic) An informal term of address.
  "“How old are you, chief?” the elevator guy said."
• (sometimes ironic) An informal term of address.

adj

• (Scotland) Intimate, friendly.
  "'You’re doing it because she was your friend, not because she was a parishioner, and certainly not because of the Declaratory Articles,' Macmurray said, pushing himself forward on his seat. 'Everybody knows how chief you and she were. It was an unfitting relationship for a minister while she was alive, and it is equally unfitting for you to do her a favour like this now she's dead.'"

verb

• (slang) To smoke cannabis.