1. [n]  use of physical or mental energy; hard work; "he got an A for effort"; "they managed only with great exertion"
2. [n]  salty fluid secreted by sweat glands; "sweat poured off his brow"
3. [n]  condensation of moisture on a cold surface; "the cold glasses were streaked with sweat"
4. [n]  agitation resulting from active worry; "don't get in a stew"; "he's in a sweat about exams"
5. [v]  excrete perspiration through the pores in the skin; "Exercise makes one sweat"

Sweat
Finalist for the 1995 Lambda Literary Award for Best Lesbian Fiction.

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1. \Sweat\, v. i. [imp. & p. p. {Sweat} or {Sweated} (Obs.
   {Swat}); p. pr. & vb. n. {Sweating}.] [OE. sweten, AS.
   sw[ae]tan, fr. sw[=a]t, n., sweat; akin to OFries. & OS.
   sw[=e]t, D. zweet, OHG. sweiz, G. schweiss, Icel. sviti,
   sveiti, Sw. svett, Dan. sved, L. sudor sweat, sudare to
   sweat, Gr. ?, ?, sweat, ? to sweat, Skr. sv[=e]da sweat, svid
   to sweat. [root]178. Cf. {Exude}, {Sudary}, {Sudorific}.]
   1. To excrete sensible moisture from the pores of the skin;
      to perspire. --Shak.
   2. Fig.: To perspire in toil; to work hard; to drudge.
            He 'd have the poets sweat.           --Waller.
   3. To emit moisture, as green plants in a heap.
   

2. \Sweat\, v. t.
   1. To cause to excrete moisture from the skin; to cause to
      perspire; as, his physicians attempted to sweat him by
      most powerful sudorifics.
   2. To emit or suffer to flow from the pores; to exude.
            It made her not a drop for sweat.     --Chaucer.
            With exercise she sweat ill humors out. --Dryden.
   3. To unite by heating, after the application of soldier.
   4. To get something advantageous, as money, property, or
      labor from (any one), by exaction or oppression; as, to
      sweat a spendthrift; to sweat laborers. [Colloq.]
   {To sweat coin}, to remove a portion of a piece of coin, as
      by shaking it with others in a bag, so that the friction
      wears off a small quantity of the metal.
            The only use of it [money] which is interdicted is
            to put it in circulation again after having
            diminished its weight by ``sweating'', or otherwise,
            because the quantity of metal contains is no longer
            consistent with its impression.       --R. Cobden.
   

3. \Sweat\, n. [Cf. OE. swot, AS. sw[=a]t. See {Sweat}, v.
   i.]
   1. (Physiol.) The fluid which is excreted from the skin of an
      animal; the fluid secreted by the sudoriferous glands; a
      transparent, colorless, acid liquid with a peculiar odor,
      containing some fatty acids and mineral matter;
      perspiration. See {Perspiration}.
            In the sweat of thy face shalt thou eat bread.
                                                  --Gen. iii.
                                                  19.
   2. The act of sweating; or the state of one who sweats;
      hence, labor; toil; drudgery. --Shak.
   3. Moisture issuing from any substance; as, the sweat of hay
      or grain in a mow or stack. --Mortimer.
   4. The sweating sickness. [Obs.] --Holinshed.
   5. (Man.) A short run by a race horse in exercise.
   {Sweat box} (Naut.), a small closet in which refractory men
      are confined.
   {Sweat glands} (Anat.), sudoriferous glands. See under
      {Sudoriferous}.