A Mace

1. A heavy fighting club.
2. A ceremonial form of this weapon.
3. A long baton used by some drum majors to keep time and lead a marching band. If this baton is referred to as a mace, by convention it has a ceremonial often decorative head, which, if of metal, usually is hollow and sometimes intricately worked.
4. An officer who carries a mace as an emblem of authority
5. A knobbed mallet used by curriers in dressing leather to make it supple.
6. (archaic) A billiard cue.