The Collaborative International Dictionary of English v.0.48:

Brew \Brew\, v. i.
   1. To attend to the business, or go through the processes, of
      brewing or making beer.
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            I wash, wring, brew, bake, scour.     --Shak.
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   2. To be in a state of preparation; to be mixing, forming, or
      gathering; as, a storm brews in the west.
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            There is some ill a-brewing towards my rest. --Shak.
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The Collaborative International Dictionary of English v.0.48:

Brew \Brew\ (br[udd]), v. t. [imp. & p. p. Brewed (br[udd]d);
   p. pr. & vb. n. Brewing.] [OE. brewen, AS. bre['o]wan; akin
   to D. brouwen, OHG. priuwan, MHG. briuwen, br[=u]wen, G.
   brauen, Icel. brugga, Sw. brygga, Dan. brygge, and perh. to
   L. defrutum must boiled down, Gr. bry^ton (for fry^ton?) a
   kind of beer. The original meaning seems to have been to
   prepare by heat. [root]93. Cf. Broth, Bread.]
   1. To boil or seethe; to cook. [Obs.]
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   2. To prepare, as beer or other liquor, from malt and hops,
      or from other materials, by steeping, boiling, and
      fermentation. "She brews good ale." --Shak.
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   3. To prepare by steeping and mingling; to concoct.
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            Go, brew me a pottle of sack finely.  --Shak.
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   4. To foment or prepare, as by brewing; to contrive; to plot;
      to concoct; to hatch; as, to brew mischief.
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            Hence with thy brewed enchantments, foul deceiver!
                                                  --Milton.
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The Collaborative International Dictionary of English v.0.48:

Brew \Brew\, n.
   The mixture formed by brewing; that which is brewed. --Bacon.
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WordNet (r) 3.0 (2006):

brew
    n 1: drink made by steeping and boiling and fermenting rather
         than distilling [syn: brew, brewage]
    v 1: prepare by brewing; "people have been brewing beer for
         thousands of years"
    2: sit or let sit in boiling water so as to extract the flavor;
       "the tea is brewing"