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A small defensive structure or position; a small fort.
[Middle English, from Medieval Latin fortalitia; see fortress.]
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.
(Fortifications) a small fort or outwork of a fortification
[C15: from Medieval Latin fortalitia, from Latin fortis strong; see fortress]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
for•ta•lice(ˈfɔr tl ɪs)
1. a small fort.
2. Archaic. a fortress.
[1375–1425; late Middle English < Medieval Latin fortalitia, fortalitium, derivative of Latin fortis strong]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.