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A platform or level ground surface on which heavy guns are mounted.

[French terreplein, from Italian terrapieno, from terrapienare, to fill with earth : terra, earth (from Latin; see ters- in Indo-European roots) + pieno, full (from Latin plēnus; see pelə- in Indo-European roots).]
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.


1. (Fortifications) the top of a rampart where guns are placed behind the parapet
2. (Fortifications) an embankment with a level top surface
[C16: from French, from Medieval Latin phrase terrā plēnus filled with earth]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈtɛrˌpleɪn, ˈtɛr ə-)

a level space behind the parapet of a rampart on which artillery was placed.
[1585–95; < French < Italian terrapieno, derivative of terrapienare to fill with earth; see terra, plenum]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.terreplein - level space where heavy guns can be mounted behind the parapet at the top of a rampart
space - an area reserved for some particular purpose; "the laboratory's floor space"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
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(185) Another five years were to pass before the three town-side bastions and adequate terrepleins within the modernized fortress were completed.
The shape of the bastions, which are key architectural elements, permitted a cannon on their decks (terrepleins) to fire in all directions.