We found 3 dictionaries that define the word on a knife-edge:

General (2 matching dictionaries)

1. on a knife-edge: Merriam-Webster
2. on a knife-edge: Cambridge Advanced Learner's Dictionary

Miscellaneous (1 matching dictionary)

3. on a knife-edge: Idioms

▸ Words similar to on a knife-edge ▸ Usage examples for on a knife-edge ▸ Idioms related to on a knife-edge ▸ Wikipedia articles (New!) ▸ Words that often appear near on a knife-edge ▸ Rhymes of on a knife-edge ▸ Invented words related to on a knife-edge