Dictionary.com

impermeable

[ im-pur-mee-uh-buhl ]
/ ɪmˈpɜr mi ə bəl /
Save This Word!
See synonyms for: impermeable / impermeability on Thesaurus.com

adjective

not permeable; impassable.
Chemistry, Geology. (of porous substances, rocks, etc.) not permitting the passage of a fluid through the pores, interstices, etc.

QUIZZES

THINK YOU’VE GOT A HANDLE ON THIS US STATE NICKNAME QUIZ?

Did you ever collect all those state quarters? Put them to good use on this quiz about curious state monikers and the facts around them.
Question 1 of 8
Mississippi’s nickname comes from the magnificent trees that grow there. What is it?

Origin of impermeable

From the Late Latin word impermeābilis, dating back to 1690–1700. See im-2, permeable

OTHER WORDS FROM impermeable

im·per·me·a·bil·i·ty, im·per·me·a·ble·ness, nounim·per·me·a·bly, adverb

WORDS THAT MAY BE CONFUSED WITH impermeable

impermeable , impervious
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Example sentences from the Web for impermeable

British Dictionary definitions for impermeable

impermeable
/ (ɪmˈpɜːmɪəbəl) /

adjective

(of a substance) not allowing the passage of a fluid through interstices; not permeable

Derived forms of impermeable

impermeability or impermeableness, nounimpermeably, adverb
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

Medical definitions for impermeable

impermeable
[ ĭm-pûrmē-ə-bəl ]

adj.

Impossible to permeate; not permitting passage.

Other words from impermeable

im•per′me•a•bili•ty null n.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for impermeable

impermeable
[ ĭm-pûrmē-ə-bəl ]

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.
Tired of Typos? Get Help Now!