(ecclesiastical, obsolete) A archbishop's cross. / (historical) An early instrument, consisting of a wooden rod with a sliding crosspiece, used for measuring the altitude of a star or for surveying.

(management) Any secondary business activity that supports the line functions of a business, but does not directly affect customers or profits

(US, Canada) Half-mast.

(music) A staff that starts with a treble clef.

(music) a staff which starts with a bass clef

(music) a treble staff joined to a bass staff by means of a brace, with the treble staff on top

(military) The senior officer of any of several services of the armed forces of several nations. / (government, politics) The head of any of several political departments in several nations.

A non-commissioned officer in the armed forces of several countries, ranking above a sergeant. (Sometimes abbreviated to "staff").

An employee in an organisation

plural of member of staff