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1. Partly or moderately rigid.
2. Being an airship designed with a rigid internal keel but without an internal framework.
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. partly but not wholly rigid
2. (Aeronautics) (of an airship) maintaining shape by means of a main supporting keel and internal gas pressure
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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|Adj.||1.||semirigid - having a form maintained by a rigid internal structure as well as by internal gas pressure|
rigid - designating an airship or dirigible having a form maintained by a stiff unyielding frame or structure
|2.||semirigid - not fully rigid|
inflexible - resistant to being bent; "an inflexible iron bar"; "an inflexible knife blade";
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.