1. nose to the grindstone - Noun
2. nose to the grindstone - Adverb
3. nose to the grindstone - Phrase
(idiomatic, obsolete) Used to form idioms meaning "to force someone to work hard or to focus intensely upon their work".
(idiomatic) Used to form idioms meaning "to force oneself to work hard or to focus intensely upon one's work".
nose to the grindstone (not comparable)
(idiomatic) Hard at work.
Nose to the grindstone, he was up all night.