To make or become slender or more slender.(verb-transitive)
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 "slenderize" in a sentence
"Self magazine felt the need to digitally slenderize singer Kelly Clarkson before putting her on the cover of its "total body confidence" issue, even though Clarkson has said that she is comfortable with herself just the way she is."
"New York's Whitney Museum wanted Renzo Piano to slenderize his design for a downtown expansion to save costs, and the Tate Modern in London asked Herzog & de Meuron to simplify the scheme for its new addition by excising complex glass protrusions."
"Despite writing a great book, my abs are cursing you for recommending that ‘evil’ exercise to slenderize my inner tube!"