The American Heritage® Dictionary of the English Language, 4th Edition
n. A reaction in which an ester is heated with an alkali, such as sodium hydroxide, producing a free alcohol and an acid salt, especially alkaline hydrolysis of a fat or oil to make soap.
n. The hydrolysis of an ester under basic conditions to form an alcohol and the salt of the acid.
n. The reaction of a metallic alkali (base) with a fat or oil to form soap.
the GNU version of the Collaborative International Dictionary of English
n. The act, process, or result, of soap making; conversion into soap; specifically (Chem.), the decomposition of fats and other ethereal salts by alkalies.
The Century Dictionary and Cyclopedia
n. Conversion into soap; the process in which fatty substances, through combination with an alkali, form soap.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a chemical reaction in which an ester is heated with an alkali (especially the alkaline hydrolysis of a fat or oil to make soap)