Definition of fall or drop, sink, etc. to one's knees in English:
Assume a kneeling position.
- Catholics in Pope John Paul II's hometown fell to their knees and wept as the news of his death reached them last night at the end of a special mass.
- And at Santo Domingo airport, relatives of passengers aboard the plane sobbed and fell to their knees in grief.
- I fell to my knees and started to cry again.