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1. Not flexible or pliant; stiff: a rigid material. See Synonyms at stiff.
2. Not moving or flexing: rigid muscles.
3. Not changing or adjusting to different conditions or problems: a rigid thinker; a rigid hierarchy.
4. Scrupulously or severely maintained or performed; rigorous or harsh: rigid discipline.
5. Being an airship with a external frame made of rigid parts.

[Middle English rigide, from Latin rigidus, from rigēre, to be stiff; see reig- in Indo-European roots.]

rig′id·ly adv.
rig′id·ness n.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.rigidness - the physical property of being stiff and resisting bending
inelasticity - the lack of elasticity
inflexibility, inflexibleness - a lack of physical flexibility
2.rigidness - the quality of being rigid and rigorously severe
unadaptability - the inability to change or be changed to fit changed circumstances




(ˈridʒid) adjective
1. completely stiff; not able to be bent (easily). An iron bar is rigid.
2. very strict, and not likely to change. rigid rules; rigid discipline; rigid views on education; a stern, rigid headmaster.
ˈrigidly adverb
ˈrigidness, riˈgidity noun
References in periodicals archive ?
Milliken's Vis Tape features an ultra-soft feel for their durable tape, which eliminates the rigidness commonly found in other tapes and ropes.
The plus side to this fabric is the rigidness of it - it will skim over any wobbly bits.
Dilla is a thick fiber of heteromorphic section with 16 dtex, and the nonwovens offer superior breath-ability and rigidness, while heat resistance and intensity are high.
I am well aware of the rigidness of these relations, thanks to the many diplomatic visits I have made to serve this end," the Egyptian diplomat said, adding that it is very essential for his country to maintain such robust relations.
p py separa rigidn I didn't believe in the Brit is best philosophy at the time, especially after the two separate pieces of the Metro with the rigidness of a pantomime horse decided to go their separate ways on a dual carriageway in 1988.
And, more important, the rigidness of the Army bureaucracy.
If Europe is to remain an environmental leader, as well as a center of innovation and competitiveness, it will have to abandon its ideological rigidness and embrace realistic, pragmatic solutions that can deliver environmental benefits without sacrificing economic development.
Although polypropylene gives the appearance of a "no-label look," with its excellent clarity, the material's rigidness can cause wrinkling once applied to uneven surfaces, so O-I Peldar dismissed this film as a solution.
These two definitions seem to contradict each other where the former is begging for rigidness and rules and the latter seems a bit more flexible.
As there is less actual air inside the tyre, the key benefit of the new tyre is its stiffer sidewall that helps maintain the structural rigidness as-well-as helps in maintaining a constant pressure.
As such, it is a minority woman's version, and it critiques the centeredness and rigidness that derive from a dominant perspective or white male bias.
Its physico-chemical features in addition to mechanical properties are similar to those of polypropylene (PP) and polylactic-co-glycolic acids (PLGA) but inferior in its rigidness [1,4] The major function of PHB in microorganisms is to serve as an intracellular energy and carbon storage product in much the same mode as glycogen in mammalian tissue.