condensation

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The act of condensing.
• noun The state of being condensed.
• noun An abridgment or shortening of something, especially of a written work or speech.
• noun The process by which a gas or vapor changes to a liquid.
• noun The liquid so formed.
• noun Chemistry A chemical reaction in which water or another simple substance is released by the combination of two or more molecules.
• noun Psychology The process by which a single symbol or word is associated with the emotional content of several, not necessarily related, ideas, feelings, memories, or impulses, especially as expressed in dreams.

from The Century Dictionary.

• noun The act of making, or the state of being made, dense or compact; reduction of volume or compass, as by pressure, concentration, or elimination of foreign material; closer union of parts; compression; consolidation: used in both literal and figurative senses.
• noun In chem. and physical, the act of reducing a gas or vapor to a liquid or solid form.
• noun In organic chemistry, the union of two carbon atoms which may be in the same or in different molecules.

from the GNU version of the Collaborative International Dictionary of English.

• noun The act or process of condensing or of being condensed; the state of being condensed.
• noun (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.
• noun (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.
• noun (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.
• noun the system of condensing steam by contact with cold metallic surfaces, in distinction from condensation by the injection of cold water.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The act or process of condensing or of being condensed; the state of being condensed
• noun physics The conversion of a gas to a liquid; the condensate so formed
• noun chemistry The reaction of two substances with the simultaneous loss of water or other small molecule

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a shortened version of a written work
• noun (psychoanalysis) an unconscious process whereby two ideas or images combine into a single symbol; especially in dreams
• noun the process of changing from a gaseous to a liquid or solid state
• noun the process or result of becoming smaller or pressed together
• noun atmospheric moisture that has condensed because of cold
• noun the act of increasing the density of something