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1. Not rigid: a nonrigid frame.
2. Of, relating to, or being a lighter-than-air aircraft that holds its shape by gas pressure.


1. not rigid; flexible
2. (Aeronautics) (of the gas envelope of an airship) flexible and held in shape only by the internal gas pressure


(nɒnˈrɪdʒ ɪd)

1. not rigid.
2. designating a type of airship having a flexible gas container without a supporting structure and held in shape only by the pressure of the gas within.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.nonrigid - designating an airship having a shape maintained only by internal gas pressure and without a supporting structure
aeronautics, astronautics - the theory and practice of navigation through air or space
rigid - designating an airship or dirigible having a form maintained by a stiff unyielding frame or structure
References in periodicals archive ?
If we understand identity as a relation expressible only by proper names, and if we assume that proper names are rigid designators, characterized in Kripke's way, overlooking the fact that objects can also be nonrigidly designated with very different implications for K(Q-W), then it is logically uninteresting to conclude that identity is always necessary and never merely contingent.
We can, after all, nonrigidly say []xFx = []xGx [right arrow] [for all]H[H[]xFx [right arrow] H[]xGx], with the same presumption of truth, as we can say in a rigidly designative idiom that a = b [right arrow] [for all]F[Fa [right arrow] Fb].
If we expand K(Q-W) assumption (1) to take nonrigidly designative identity relations also into account, then we might substitute the otherwise redundant but in this context more informatively explicit proposition: