1. [n]  ornament consisting of a circular rounded protuberance (as on a vault or shield or belt)
2. [n]  a person responsible for hiring workers; "the boss hired three more men for the new job"
3. [n]  a person who exercises control and makes decisions; "he is his own boss now"
4. [n]  a person who exercises control over workers; "if you want to leave early you have to ask the foreman"
5. [n]  a leader in a political party who controls votes and dictates appointments; "party bosses have a reputation for corruption"
6. [adj]  (informal) exceptionally good; "a boss hand at carpentry"; "his brag cornfield"
7. [v]  raise in a relief; "embossed stationary"

Boss
Boss

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1. \Boss\ (b[o^]s; 115), n.; pl. {Bosses} (-[e^]z). [OE. boce,
   bose, boche, OF. boce, boche, bosse, F. bosse, of G. origin;
   cf. OHG. b[=o]zo tuft, bunch, OHG. b[=o]zan, MHG. b[^o]zen,
   to beat. See {Beat}, and cf. {Botch} a swelling.]
   1. Any protuberant part; a round, swelling part or body; a
      knoblike process; as, a boss of wood.
   2. A protuberant ornament on any work, either of different
      material from that of the work or of the same, as upon a
      buckler or bridle; a stud; a knob; the central projection
      of a shield. See {Umbilicus}.
   3. (Arch.) A projecting ornament placed at the intersection
      of the ribs of ceilings, whether vaulted or flat, and in
      other situations.
   4. [Cf. D. bus box, Dan. b["o]sse.] A wooden vessel for the
      mortar used in tiling or masonry, hung by a hook from the
      laths, or from the rounds of a ladder. --Gwilt.
   5. (Mech.)
      (a) The enlarged part of a shaft, on which a wheel is
          keyed, or at the end, where it is coupled to another.
      (b) A swage or die used for shaping metals.
   6. A head or reservoir of water. [Obs.]
   

2. \Boss\ (b[o^]s), v. t. [imp. & p. p. {Bossed} (b[o^]st); p.
   pr. & vb. n. {Bossing}.] [OE. bocen, fr. OF. bocier. See the
   preceding word.]
   To ornament with bosses; to stud.
   

3. \Boss\, n. [D. baas master.]
   A master workman or superintendent; a director or manager; a
   political dictator. [Slang, U. S.]
   

Bridgport Operating System Software. A derivative of the ISO 1054 numerical machine control language for milling, etc.