con·den·sa·tion (kŏn′dĕn-sāshən, -dən-)
1. The act of condensing.
2. The state of being condensed.
3. An abridgment or shortening of something, especially of a written work or speech.
a. The process by which a gas or vapor changes to a liquid.
b. The liquid so formed.
5. Chemistry A chemical reaction in which water or another simple substance is released by the combination of two or more molecules.
6. Psychology In psychoanalytic theory, 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.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.