The Collaborative International Dictionary of English v.0.48:

Mace \Mace\, n. [F. macis, L. macis, macir, Gr. ?; cf. Skr.
   makaranda the nectar or honey of a flower, a fragrant mango.]
   (Bot.)
   A kind of spice; the aril which partly covers nutmegs. See
   Nutmeg.
   [1913 Webster]

   Note: Red mace is the aril of Myristica tingens, and
         white mace that of Myristica Otoba, -- East Indian
         trees of the same genus with the nutmeg tree.
         [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mace \Mace\ (m[=a]s), n. [Jav. & Malay. m[=a]s, fr. Skr.
   m[=a]sha a bean.]
   A money of account in China equal to one tenth of a tael;
   also, a weight of 57.98 grains. --S. W. Williams.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mace \Mace\, n. [OF. mace, F. masse, from (assumed) L. matea, of
   which the dim. mateola a kind of mallet or beetle, is found.]
   1. A heavy staff or club of metal; a spiked club; -- used as
      weapon in war before the general use of firearms,
      especially in the Middle Ages, for breaking metal armor.
      --Chaucer.
      [1913 Webster]

            Death with his mace petrific . . . smote. --Milton.
      [1913 Webster]

   2. Hence: A staff borne by, or carried before, a magistrate
      as an ensign of his authority. "Swayed the royal mace."
      --Wordsworth.
      [1913 Webster]

   3. An officer who carries a mace as an emblem of authority; a
      macebearer. --Macaulay.
      [1913 Webster]

   4. A knobbed mallet used by curriers in dressing leather to
      make it supple.
      [1913 Webster]

   5. (Billiards) A rod for playing billiards, having one end
      suited to resting on the table and pushed with one hand.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mace \Mace\, prop. n. [Trademark.]
   A chemical preparation containing tear gas in a solvent,
   packaged in the form of a spray, and used to temporarily
   incapacitate people, such as rioters or criminals, by causing
   intense eye and skin irritation; also called chemical mace.
   It is designed to be a non-lethal weapon for defending
   against violent people.
   [PJC] macebearer

WordNet (r) 3.0 (2006):

Mace
    n 1: (trademark) a liquid that temporarily disables a person;
         prepared as an aerosol and sprayed in the face, it
         irritates the eyes and causes dizziness and immobilization
         [syn: Mace, Chemical Mace]
    2: an official who carries a mace of office [syn: macebearer,
       mace, macer]
    3: spice made from the dried fleshy covering of the nutmeg seed
    4: a ceremonial staff carried as a symbol of office or authority

The Free On-line Dictionary of Computing (19 January 2023):

MACE

   A concurrent object-oriented language.


The Devil's Dictionary (1881-1906):

MACE, n.  A staff of office signifying authority.  Its form, that of a
heavy club, indicates its original purpose and use in dissuading from
dissent.