Fell-over meaning

I was enjoying myself until I fell over the cliff.

As silence fell over the courtyard, she opened her eyes.

A surprised silence fell over those in the street before someone bellowed.

A hushed silence fell over the verandah and the strains of an old song filtered soft music through the air.

While Cook was speculating on the cause of this phenomenon, and was in the act of ordering out the boats to take soundings, the " Endeavour " struck heavily, and fell over so much that the guns, spare cables, and other heavy gear had at once to be thrown overboard to lighten the ship. As day broke, attempts were made to float the vessel off with the morning tide; but these were unsuccessful.