We found 17 dictionaries that define the word gnashing:

General (12 matching dictionaries)

1. gnashing: Merriam-Webster
2. gnashing: Collins English Dictionary
3. gnashing: Vocabulary.com
4. Gnashing, gnashing: Wordnik
5. gnashing: Wiktionary
6. Gnashing, gnashing: Dictionary.com
7. gnashing: Cambridge Essential American English Dictionary
8. Gnashing: Online Plain Text English Dictionary
9. Gnashing: AllWords.com Multi-Lingual Dictionary
10. gnashing: Webster's 1828 Dictionary
11. gnashing: FreeDictionary.org
12. gnashing: TheFreeDictionary.com

Medicine (3 matching dictionaries)

13. Gnashing: MedTerms.com Medical Dictionary
14. online medical dictionary (No longer online)
15. Gnashing: Drug Medical Dictionary

Miscellaneous (1 matching dictionary)

16. gnashing: Idioms

Slang (1 matching dictionary)

17. gnashing: Urban Dictionary

(Note: See gnash as well.)

Definitions from Wiktionary (gnashing) ▸ noun:  The action of something that is gnashed. Similar: clenching, gashing, banging, biting, ratcheting, biting point, pounding, grabbing, grind, slashing, more... Opposite: smiling, grinning, beaming, smirking Phrases: teeth gnashing, gnashing of teeth, Weeping and gnashing of teeth, more... Adjectives: much, great, impotent, teeth, incessant, actual, fearsome, involuntary, considerable, hungry, last ▸ Words similar to gnashing ▸ Usage examples for gnashing ▸ Idioms related to gnashing ▸ Wikipedia articles (New!) ▸ Popular adjectives describing gnashing ▸ Words that often appear near gnashing ▸ Rhymes of gnashing ▸ Invented words related to gnashing