vallation

val·la·tion

 (vă-lā′shən)
n.
1. An earthwork wall used for military defense; a rampart.
2. The process of planning or erecting earth fortifications.

[Late Latin vallātiō, vallātiōn-, from Latin vallātus, past participle of vallāre, to surround with a rampart, from vallum, rampart, from vallus, stake.]

val′la·to′ry (văl′ə-tôr′ē) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

vallation

(vəˈleɪʃən)
n
1. (Fortifications) the act or process of building fortifications
2. (Fortifications) a wall or rampart
[C17: from Late Latin vallātiō, from vallum rampart]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
The speculative non-buddhism investigator forfeits his commission if he serves as either the shape of the buddhistic thought-world or as a revolutionary storming the gates of the Buddhist vallation. Disinterest's physical corollary, when confronted with charismatic Buddhist omens, is the shrug of a shoulder, followed by a concerned glance toward the harbinger.
A relation of the investigator to Buddhism's vallation. Too close, and the effulgence of Buddhism's charism blinds; too far away, and the embers turn cold.
An exile is someone who finds himself in fitting proximity to Buddhism's vallation. I say "finds himself because exile, in this case, is not forced: it occurs incidentally and unexpectedly.