vallation

[ va-ley-shuh n ]
/ væˈleɪ ʃən /

noun Fortification.

a rampart or entrenchment.
the process or technique of constructing ramparts.

Origin of vallation

1655–65; < Late Latin vallāt(us) (see vallate) + -iōn- -ion
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for vallation

vallation
/ (vəˈleɪʃən) /

noun

the act or process of building fortifications
a wall or rampart

Word Origin for vallation

C17: from Late Latin vallātiō, from vallum rampart
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012