The Collaborative International Dictionary of English v.0.48:

Juice \Juice\ (j[=u]s), n. [OE. juse, F. jus broth, gravy,
   juice, L. jus; akin to Skr. y[=u]sha.]
   The characteristic fluid of any vegetable or animal
   substance; the sap or part which can be expressed from fruit,
   etc.; the fluid part which separates from meat in cooking.
   [1913 Webster]

         An animal whose juices are unsound.      --Arbuthnot.
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         The juice of July flowers.               --B. Jonson.
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         The juice of Egypt's grape.              --Shak.
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         Letters which Edward Digby wrote in lemon juice.
                                                  --Macaulay.
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         Cold water draws the juice of meat.      --Mrs.
                                                  Whitney.
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The Collaborative International Dictionary of English v.0.48:

Juice \Juice\ (j[=u]s), v. t.
   To moisten; to wet. [Obs.] --Fuller.
   [1913 Webster]

WordNet (r) 3.0 (2006):

juice
    n 1: the liquid part that can be extracted from plant or animal
         tissue by squeezing or cooking
    2: energetic vitality; "her creative juices were flowing"
    3: electric current; "when the wiring was finished they turned
       on the juice"
    4: any of several liquids of the body; "digestive juices" [syn:
       juice, succus]

Moby Thesaurus II by Grady Ward, 1.0:

71 Moby Thesaurus words for "juice":
   AC, DC, absorption current, active current, alcohol,
   alternating current, aqua vitae, beverage, blood, booze,
   conduction current, convection current, cycle, delta current,
   dielectric displacement current, direct current,
   displacement current, drink, eddy current, electric current,
   electric stream, emission current, essence, exciting current,
   extract, firewater, fluid, fluid extract, fluid mechanics, force,
   free alternating current, galvanic current, grog,
   high-frequency current, hooch, hydraulics, hydrogeology,
   idle current, induced current, induction current,
   ionization current, latex, liquid, liquid extract, liquor,
   low-frequency current, magnetizing current, milk,
   multiphase current, pith, power, pulsating direct current,
   reactive current, rotary current, sap, semiliquid,
   single-phase alternating current, spirit, spirits, stray current,
   strength, thermionic current, thermoelectric current,
   three-phase alternating current, tipple, vigor, vitality,
   voltaic current, water, watt current, whey



The Jargon File (version 4.4.7, 29 Dec 2003):

juice
 n.

    The weight of a given node in some sort of graph (like a web of trust or a
    relevance-weighted search query). This appears to have been generalized
    from google juice, but may derive from black urban slang for power or a
    respect. Example: ?I signed your key, but I really don't have the juice to
    be authoritative.?