The act or process of making or becoming thick.(noun)
Material used to thicken: stir in a thickening of flour and water. (noun)
A thickened part.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "thickening" in a sentence
"• Use sweet rice flour to replace the traditional wheat flour in thickening gravy."
"Little Wolf-Willow's head was whirling, his brain thickening, his fingers clutching aimlessly."
"A group of Canadian officials is calling for the appointment of special ambassadors on both sides of the border to help deal with what they call the thickening of international crossings."