The Collaborative International Dictionary of English v.0.48:

Extract \Ex"tract`\, n.
   1. That which is extracted or drawn out.
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   2. A portion of a book or document, separately transcribed; a
      citation; a quotation.
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   3. A decoction, solution, or infusion made by dissolving out
      from any substance that which gives it its essential and
      characteristic virtue; essence; as, extract of beef;
      extract of dandelion; also, any substance so extracted,
      and characteristic of that from which it is obtained; as,
      quinine is the most important extract of Peruvian bark.
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   4. (Med.) A solid preparation obtained by evaporating a
      solution of a drug, etc., or the fresh juice of a plant;
      -- distinguished from an abstract. See Abstract, n., 4.
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   5. (Old Chem.) A peculiar principle once erroneously supposed
      to form the basis of all vegetable extracts; -- called
      also the extractive principle. [Obs.]
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   6. Extraction; descent. [Obs.] --South.
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   7. (Scots Law) A draught or copy of writing; certified copy
      of the proceedings in an action and the judgement therein,
      with an order for execution. --Tomlins.
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   Fluid extract (Med.), a concentrated liquid preparation,
      containing a definite proportion of the active principles
      of a medicinal substance. At present a fluid gram of
      extract should represent a gram of the crude drug.
      Extractable

The Collaborative International Dictionary of English v.0.48:

Extract \Ex*tract"\, v. t. [imp. & p. p. Extracted; p. pr. &
   vb. n. Extracting.] [L. extractus, p. p. of extrahere to
   extract; ex out + trahere to draw. See Trace, and cf.
   Estreat.]
   1. To draw out or forth; to pull out; to remove forcibly from
      a fixed position, as by traction or suction, etc.; as, to
      extract a tooth from its socket, a stump from the earth, a
      splinter from the finger.
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            The bee
            Sits on the bloom extracting liquid sweet. --Milton.
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   2. To withdraw by expression, distillation, or other
      mechanical or chemical process; as, to extract an essence.
      Cf. Abstract, v. t., 6.
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            Sunbeams may be extracted from cucumbers, but the
            process is tedious.
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   3. To take by selection; to choose out; to cite or quote, as
      a passage from a book.
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            I have extracted out of that pamphlet a few
            notorious falsehoods.                 --Swift.
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   To extract the root (Math.), to ascertain the root of a
      number or quantity.
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WordNet (r) 3.0 (2006):

extract
    n 1: a solution obtained by steeping or soaking a substance
         (usually in water) [syn: infusion, extract]
    2: a passage selected from a larger work; "he presented excerpts
       from William James' philosophical writings" [syn: excerpt,
       excerption, extract, selection]
    v 1: remove, usually with some force or effort; also used in an
         abstract sense; "pull weeds"; "extract a bad tooth"; "take
         out a splinter"; "extract information from the telegram"
         [syn: extract, pull out, pull, pull up, take out,
         draw out]
    2: get despite difficulties or obstacles; "I extracted a promise
       from the Dean for two new positions"
    3: deduce (a principle) or construe (a meaning); "We drew out
       some interesting linguistic data from the native informant"
       [syn: educe, evoke, elicit, extract, draw out]
    4: extract by the process of distillation; "distill the essence
       of this compound" [syn: distill, extract, distil]
    5: separate (a metal) from an ore
    6: obtain from a substance, as by mechanical action; "Italians
       express coffee rather than filter it" [syn: press out,
       express, extract]
    7: take out of a literary work in order to cite or copy [syn:
       excerpt, extract, take out]
    8: calculate the root of a number