Dumbledore had already crossed the crenellated ramparts and was dismounting; Harry landed next to him seconds later and looked around.
He looked terrified as he stared into Dumbledore’s face, which was even paler, and rather lower than usual, as he had slid so far down the rampart wall.
The ramparts were deserted.
Standing against the ramparts, very white in the face, Dumbledore still showed no sign of panic or distress.
’I said no!’ shouted the brutal-faced man; there was a flash of light and the werewolf was blasted out of the way; he hit the ramparts and staggered, looking furious.
’Yeah, well, you still didn’t realise who was behind that stuff, did you?’ sneered Malfoy, as Dumbledore slid a little down the ramparts, the strength in his legs apparently fading, and Harry struggled fruitlessly, mutely, against the enchantment binding him.
He could not understand how it had happened — Expelliarmus was not a Freezing Charm — Then, by the light of the Mark, he saw Dumbledore’s wand flying in an arc over the edge of the ramparts and under-stood … Dumbledore had wordlessly immobilised Harry, and the second he had taken to perform the spell had cost him the chance of defending himself.
…that nobody could hear him standing there, imprisoned by Dumbledore’s spell —if he could only move, he could aim a curse from under the Cloak — ’Draco, do it, or stand aside so one of us —’ screeched the woman, but at that precise moment the door to the ramparts burst open once more and there stood Snape, his wand clutched in his hand as his black eyes swept the scene, from Dumbledore slumped against the wall, to the four Death Eaters, including the enraged werewolf, and Malfoy.
There are no more uses of "rampart" in the book.
Show samples from other sources
they stormed the ramparts of the city
The invaders were unable to penetrate the outer ramparts.