- not permeable; impassable.
- Chemistry, Geology. (of porous substances, rocks, etc.) not permitting the passage of a fluid through the pores, interstices, etc.
Origin of impermeable
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for impermeable
The daily hardships demand an impermeable skin for survival.Boko Loco: A View From Nigeria
May 9, 2014
"I don't know that I would call him impermeable, but he just about is," Ryggs says.With an Eye on South Carolina, Lindsey Graham Takes Aim at Chuck Hagel
February 11, 2013
Polish typically interferes with the procedure by creating an impermeable barrier on the nail bed.Breathable Nail Polish Fits Muslim Women's Religious Restrictions
Misty White Sidell
January 28, 2013
It was consensus, the impermeable devotion to an article of faith.Hurricane "Jerusalem" Hits the DNC
September 5, 2012
He was so gross, so impermeable to all the subtler issues of being.Tales of Space and Time
Herbert George Wells
You could not culturalize the impermeable texture of their vulgarity.The Freelands
It is because faith has this origin that it is, in a sense, "impermeable to experience."The Elementary Forms of the Religious Life
A word that has reclassified in an entertaining manner our impermeable and eternal ignorance.The Roycroft Dictionary
The wing rose by means of a crank and a moveable piston, and was covered by impermeable taffeta.The Romance of Leonardo da Vinci
Dmitry Sergeyevich Merezhkovsky
- (of a substance) not allowing the passage of a fluid through interstices; not permeable
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for impermeable
Online Etymology Dictionary, © 2010 Douglas Harper
- Impossible to permeate; not permitting passage.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- Relating to a material through which substances, such as liquids or gases, cannot pass. Some substances, such as some types of contact lenses, are permeable to gas but impermeable to liquid.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.