stiff or unyielding; not pliant or flexible; hard: a rigid strip of metal.
firmly fixed or set.
inflexible, strict, or severe: a rigid disciplinarian; rigid rules of social behavior.
exacting; thorough; rigorous: a rigid examination.
so as to meet precise standards; stringent: lenses ground to rigid specifications.
Mechanics. of, relating to, or noting a body in which the distance between any pair of points remains fixed under all forces; having infinite values for its shear modulus, bulk modulus, and Young's modulus.
Aeronautics.
(of an airship or dirigible) having a form maintained by a stiff, unyielding structure contained within the envelope.
pertaining to a helicopter rotor that is held fixedly at its root.
Origin of rigid
First recorded in 1530–40; from Latin rigidus, equivalent to rig(ēre) “to be stiff, stiffen” + -idus-id4
Without them, it would not have been apparent that something rigid could fly.
The science behind how an aircraft glides|By Peter Garrison/Flying Mag|September 3, 2020|Popular Science
A rigid backplate makes it easier to insert the bladder into a backpack’s hydration sleeve, even when the pack is fully loaded—but that does add some weight.
Hydration bladders for outdoor adventures|PopSci Commerce Team|September 1, 2020|Popular Science
Hong Kong Secretary for Food and Health Sophia Chan has said they expect 5 million people to participate in the test, but Lam told reporters she has not set a “rigid target” for participation.
Hong Kong’s new mass COVID testing scheme is free and voluntary—and some citizens are suspicious|eamonbarrett|August 26, 2020|Fortune
Of course, social media is a rigid place for the testing of different messages and campaigns, but multivariate testing tools have the power to deliver fully customized website experiences for traffic arriving from various social sources.
How A/B and multivariate testing can skyrocket your social media conversions|Peter Jobes|July 3, 2020|Search Engine Watch
Eggs from the earliest dinosaurs were more like leathery turtle eggs than rigid bird eggs.
Fossil discoveries suggest the earliest dinosaurs laid soft-shelled eggs|Jack J. Lee|June 24, 2020|Science News
Bound together by mutual distrust, both sides end up lashing themselves to the mast of rigid law.
Red Tape Is Strangling Good Samaritans|Philip K. Howard|December 27, 2014|DAILY BEAST
Doctors are prohibited from doing what a patient needs by rigid practice guidelines.
Red Tape Is Strangling Good Samaritans|Philip K. Howard|December 27, 2014|DAILY BEAST
Beyond that, how will China evolve its rigid Internet policy?
China’s Internet Is Freer Than You Think|Brendon Hong|December 27, 2014|DAILY BEAST
The man behind the desk is a fictional character—a ferocious patriot exposing the limits of rigid ideology.
The End of Truthiness: Stephen Colbert’s Sublime Finale|Noel Murray|December 19, 2014|DAILY BEAST
But on an A380 or 787 Dreamliner flying long haul, you can be trapped, rigid, in that seat for half a day.
Flying Coach Is the New Hell: How Airlines Engineer You Out of Room|Clive Irving|November 25, 2014|DAILY BEAST
The stout youth's standards were his own, and rigid, as is often the case with people of his type.
The Rules of the Game|Stewart Edward White
She saw the muscles of his face settle into a rigid grimace, his eyes flared, his great breast heaved, and he nodded.
Dixie Hart|Will N. Harben
If he were rigid, he was impartial too, in asserting the laws of England.
A Child's History of England|Charles Dickens
Upon the excesses, bordering on insanity, followed the other extreme,—the most rigid abstinence.
Woman under socialism|August Bebel
One of the objects of this rigid duresse, was the coercion of the garrison.
The Lily and the Totem|William Gilmore Simms
British Dictionary definitions for rigid
rigid
/ (ˈrɪdʒɪd) /
adjective
not bending; physically inflexible or stiffa rigid piece of plastic
unbending; rigorously strict; severerigid rules
adverb
completely or excessivelythe lecture bored him rigid