The Collaborative International Dictionary of English v.0.48:

Condense \Con*dense"\, v. i.
   1. To become more compact; to be reduced into a denser form.
      [1913 Webster]

            Nitrous acid is gaseous at ordinary temperatures,
            but condenses into a very volatile liquid at the
            zero of Fahrenheit.                   --H. Spencer.
      [1913 Webster]

   2. (Chem.)
      (a) To combine or unite (as two chemical substances) with
          or without separation of some unimportant side
          products.
      (b) To undergo polymerization.
          [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Condense \Con*dense"\, v. t. [imp. & p. p. Condensed; p. pr. &
   vb. n. Condensing.] [L. condensare; con- + densare to make
   thick or dense, densus thick, dense: cf. F. condenser. See
   Dense, and cf. Condensate.]
   1. To make more close, compact, or dense; to compress or
      concentrate into a smaller compass; to consolidate; to
      abridge; to epitomize.
      [1913 Webster]

            In what shape they choose,
            Dilated or condensed, bright or obscure. --Milton.
      [1913 Webster]

            The secret course pursued at Brussels and at Madrid
            may be condensed into the usual formula,
            dissimulation, procrastination, and again
            dissimulation.                        --Motley.
      [1913 Webster]

   2. (Chem. & Physics) To reduce into another and denser form,
      as by cold or pressure; as, to condense gas into a liquid
      form, or steam into water.
      [1913 Webster]

   Condensed milk, milk reduced to the consistence of very
      thick cream by evaporation (usually with addition of
      sugar) for preservation and transportation.

   Condensing engine, a steam engine in which the steam is
      condensed after having exerted its force on the piston.

   Syn: To compress; contract; crowd; thicken; concentrate;
        abridge; epitomize; reduce.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Condense \Con*dense"\, a. [L. condensus.]
   Condensed; compact; dense. [R.]
   [1913 Webster]

         The huge condense bodies of planets.     --Bentley.
   [1913 Webster]

WordNet (r) 3.0 (2006):

condense
    v 1: undergo condensation; change from a gaseous to a liquid
         state and fall in drops; "water condenses"; "The acid
         distills at a specific temperature" [syn: condense,
         distill, distil]
    2: make more concise; "condense the contents of a book into a
       summary" [syn: digest, condense, concentrate]
    3: remove water from; "condense the milk"
    4: cause a gas or vapor to change into a liquid; "The cold air
       condensed the steam"
    5: become more compact or concentrated; "Her feelings condensed"
    6: develop due to condensation; "All our planets condensed out
       of the same material"
    7: compress or concentrate; "Congress condensed the three-year
       plan into a six-month plan" [syn: condense, concentrate,
       contract]