The Collaborative International Dictionary of English v.0.48:

Condensation \Con`den*sa"tion\, n. [L. condensatio: cf. F.
   condensation.]
   1. The act or process of condensing or of being condensed;
      the state of being condensed.
      [1913 Webster]

            He [Goldsmith] was a great and perhaps an unequaled
            master of the arts of selection and condensation.
                                                  --Macaulay.
      [1913 Webster]

   2. (Physics) The act or process of reducing, by depression of
      temperature or increase of pressure, etc., to another and
      denser form, as gas to the condition of a liquid or steam
      to water.
      [1913 Webster]

   3. (Chem.) A rearrangement or concentration of the different
      constituents of one or more substances into a distinct and
      definite compound of greater complexity and molecular
      weight, often resulting in an increase of density, as the
      condensation of oxygen into ozone, or of acetone into
      mesitylene.
      [1913 Webster]

   Condensation product (Chem.), a substance obtained by the
      polymerization of one substance, or by the union of two or
      more, with or without separation of some unimportant side
      products.

   Surface condensation, the system of condensing steam by
      contact with cold metallic surfaces, in distinction from
      condensation by the injection of cold water.
      [1913 Webster]

WordNet (r) 3.0 (2006):

condensation
    n 1: (psychoanalysis) an unconscious process whereby two ideas
         or images combine into a single symbol; especially in
         dreams
    2: the process of changing from a gaseous to a liquid or solid
       state
    3: atmospheric moisture that has condensed because of cold [syn:
       condensation, condensate]
    4: the process or result of becoming smaller or pressed
       together; "the contraction of a gas on cooling" [syn:
       compression, condensation, contraction]
    5: a shortened version of a written work [syn: condensation,
       abridgement, abridgment, capsule]
    6: the act of increasing the density of something [syn:
       condensing, condensation]

Moby Thesaurus II by Grady Ward, 1.0:

142 Moby Thesaurus words for "condensation":
   abbreviation, abbreviature, abrege, abridgment, abstract,
   accelerando, acceleration, accretion, adherence, adhesion,
   agglomeration, agglutination, aggravation, apocope, astriction,
   astringency, beefing-up, blowing up, blowup, bottleneck, breviary,
   brief, capsule, cervix, circumscription, cling, clinging, clotting,
   clumping, clustering, coagulation, coarctation, coherence,
   cohesion, cohesiveness, compactedness, compaction, compend,
   compression, compressure, concentration, concretion,
   condensed version, congealment, congelation, conglobation,
   conglomeration, consolidation, conspectus, constriction,
   constringency, contraction, contracture, curtailment, decrease,
   deepening, densification, digest, diminuendo, distillation, draft,
   dribble, drip, dripping, drop, elision, ellipsis, enhancement,
   epitome, exacerbation, exaggeration, explosion, foreshortening,
   hardening, head, heating-up, heightening, hourglass,
   hourglass figure, information explosion, inseparability,
   intensification, isthmus, junction, knitting, leaching,
   lixiviation, magnification, narrow place, narrowing, neck, outline,
   overview, pandect, percolation, pickup, population explosion,
   precis, puckering, pursing, recap, recapitulation, redoubling,
   reduction, reinforcement, retrenchment, review, rubric, seepage,
   seeping, set, shortened version, shortening, skeleton, sketch,
   solidification, speedup, spurtle, step-up, sticking, stranglement,
   strangulation, strengthening, striction, stricture, summary,
   summation, survey, sweating, syllabus, syncope, synopsis, systole,
   telescoping, thumbnail sketch, tightening, topical outline,
   trickle, tricklet, truncation, wasp waist, wrinkling