Staff

Staff may mean:
 Staff (stick), a stick or pole to help with walking, or to use as a weapon.
Employees, a group of people who work for a firm or other organization.
 Staff (music) (or stave),  five horizontal lines used for writing musical notes.
 Staff of office, a stick or pole used for ceremony by someone important.
 Staff (building material), artificial stone product for ornamental uses.
 Staff (military), the people of military command and planning.
 Jacob's staff, a tool used in surveying.
 Quarterstaff, a long pole used as a Medieval weapon.
 Bō, a long stick used as a weapon, usually in Japanese martial arts.
 Leopold Staff (1878–1957), a Polish poet.
 Gun (staff), a weapon in Chinese martial arts.
 staff is a safeworking apparatus used on single track railways.

NB
The plural of “staff” is staves.  The word  stave can also be used as a singular noun to mean:
 a single staff (music).
 a curved wooden member which is used with others to form the side of a barrel.