We found 17 dictionaries that define the word imperviousness:

General (12 matching dictionaries)

1. imperviousness: Merriam-Webster
2. imperviousness: Oxford Learner's Dictionaries
3. imperviousness: Collins English Dictionary
4. imperviousness: Vocabulary.com
5. imperviousness: Wordnik
6. imperviousness: Wiktionary
7. imperviousness: Dictionary.com
8. imperviousness: Rhymezone
9. imperviousness: Webster's 1828 Dictionary
10. imperviousness: FreeDictionary.org
11. imperviousness: Mnemonic Dictionary
12. imperviousness: TheFreeDictionary.com

Business (2 matching dictionaries)

13. Construction Term Glossary (No longer online)
14. imperviousness: Legal dictionary

Computing (1 matching dictionary)

15. imperviousness: Encyclopedia

Medicine (1 matching dictionary)

16. imperviousness: Merriam-Webster Medical Dictionary

Tech (1 matching dictionary)

17. Lake and Water Word Glossary (No longer online)

(Note: See impervious as well.)

Definitions from Wiktionary (imperviousness) ▸ noun:  The state of being impervious. ▸ noun:  The quality of being unable to be affected. ▸ noun:  The ability to prevent any penetration. Similar: impenetrability, imperviability, imperviableness, impregnableness, impenetrableness, impassableness, impassibility, invulnerableness, impermeability, unimpugnability, more... Opposite: permeability, porosity, susceptibility, vulnerability Types: invulnerability, impenetrability, indestructibility, immunity, resilience, more... Adjectives: relative, apparent, complete, certain, total, such, own, greater, absolute, very, extreme ▸ Words similar to imperviousness ▸ Usage examples for imperviousness ▸ Idioms related to imperviousness ▸ Wikipedia articles (New!) ▸ Popular adjectives describing imperviousness ▸ Words that often appear near imperviousness ▸ Rhymes of imperviousness ▸ Invented words related to imperviousness