chief

1. (uncountable, only with "in") Headship, the status of being a chief or leader.Examples: "Bob is our troubleshooter in chief."uncountable

2. (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.Examples: "When the Chief is Charged with any figure, in blazon it is said to be "On a Chief"."; "The shield was silver, charged with a red cross voided (that is, with the centre cut out and only the edges left), between in chief (that is, above the horizontal limb of the cross) two black dragon's wings, and in base two red daggers, and in the centre of the cross a black winged helmet; on a red chief (a broad band across the top of the shield), a silver pale (a broad vertical band), and thereon eight black arrows crossed X-wise, four and four, and encircled with a black band, between on the dexter three bendlets (narrow bands slanting from dexter chief to sinister base) enhanced (that is, raised above the centre), and on the sinister a fleur-de-lis, all of gold."

3. (sometimes ironic) An informal term of address.Examples: "“How old are you, chief?” the elevator guy said."ironicsometimes

4. (sometimes ironic) An informal term of address.ironicoffensivesometimes