We found 11 dictionaries that define the word keep one's nose to the grindstone:

General (10 matching dictionaries)

1. keep one's nose to the grindstone: Merriam-Webster
2. keep one's nose to the grindstone: Oxford Learner's Dictionaries
3. keep one's nose to the grindstone, keep one's nose to the grindstone: Collins English Dictionary
4. keep one's nose to the grindstone: Vocabulary.com
5. keep one's nose to the grindstone, keep ones nose to the grindstone: Dictionary.com
6. keep one's nose to the grindstone: Rhymezone
7. keep ones nose to the grindstone: FreeDictionary.org
8. keep one's nose to the grindstone: ESL Idiom Page
9. keep one's nose to the grindstone: Mnemonic Dictionary
10. keep one's nose to the grindstone: TheFreeDictionary.com

Computing (1 matching dictionary)

11. keep one's nose to the grindstone: Encyclopedia

Definitions from WordNet (keep one's nose to the grindstone) ▸ verb:  work doggedly or persistently ▸ Words similar to keep one's nose to the grindstone ▸ Usage examples for keep one's nose to the grindstone ▸ Idioms related to keep one's nose to the grindstone ▸ Wikipedia articles (New!) ▸ Words that often appear near keep one's nose to the grindstone ▸ Rhymes of keep one's nose to the grindstone ▸ Invented words related to keep one's nose to the grindstone