The Collaborative International Dictionary
Vallation
Vallation \Val*la"tion\, n. [L. vallatio, fr. vallare to surround with a rampart, fr. vallum rampart. See Wall, n.] A rampart or intrenchment.
Wiktionary
vallation
n. A rampart or entrenchment.
Usage examples of "vallation".
The mirror-vanes atop the encircling parapet serve as both detectors and signal scramblers so that from outside the vallation contact with the city is impossible.
He experienced an echo of that humbling smallness under the immense vallation of Terra Tharsis.
She could hardly walk through his siege vallations on foot, even if she managed to get out of the castle unseen.
They had no time for a methodical siege, nor was Llewelyn in any mood to construct vallations round the castle of Cardigan and sit down to starve it into submission.