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rigid

[rij-id]
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adjective
  1. stiff or unyielding; not pliant or flexible; hard: a rigid strip of metal.
  2. firmly fixed or set.
  3. inflexible, strict, or severe: a rigid disciplinarian; rigid rules of social behavior.
  4. exacting; thorough; rigorous: a rigid examination.
  5. so as to meet precise standards; stringent: lenses ground to rigid specifications.
  6. 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.
  7. Aeronautics.
    1. (of an airship or dirigible) having a form maintained by a stiff, unyielding structure contained within the envelope.
    2. pertaining to a helicopter rotor that is held fixedly at its root.
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Origin of rigid

1530–40; < Latin rigidus, equivalent to rig(ēre) to be stiff, stiffen + -idus -id4
Related formsri·gid·i·ty, rig·id·ness, nounrig·id·ly, adverbo·ver·rig·id, adjectiveo·ver·rig·id·ly, adverbo·ver·rig·id·ness, nouno·ver·ri·gid·i·ty, nounsub·rig·id, adjectivesub·rig·id·ly, adverbsub·rig·id·ness, nounsub·ri·gid·i·ty, nounun·rig·id, adjectiveun·rig·id·ly, adverbun·rig·id·ness, noun

Synonyms

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1. unbending, firm, inflexible. 2. immovable, static. 3. austere, stern, unyielding. See strict. 4, 5. demanding.

Antonyms

1. elastic. 3. lax.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018


Examples from the Web for rigidity

Contemporary Examples

Historical Examples

  • Cody's planes are noted for their neatness, rigidity and smoothness.

    Flying Machines

    W.J. Jackman and Thos. H. Russell

  • Her face flushed; then it paled and hardened with the rigidity of self-control.

    The Dominant Strain

    Anna Chapin Ray

  • The bristling mane, so thick and wolfish, fairly quivered in its rigidity.

  • The famous—or notorious—de Barral had lost his rigidity now.

    Chance

    Joseph Conrad

  • In certain cases, however, the instinct loses its rigidity and automatism.


British Dictionary definitions for rigidity

rigid

adjective
  1. not bending; physically inflexible or stiffa rigid piece of plastic
  2. unbending; rigorously strict; severerigid rules
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adverb
  1. completely or excessivelythe lecture bored him rigid
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Derived Formsrigidly, adverbrigidity or rigidness, noun

Word Origin

C16: from Latin rigidus, from rigēre to be stiff
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for rigidity

n.

1620s, from Latin rigiditas "stiffness," from rigidus (see rigid).

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rigid

adj.

early 15c., from Latin rigidus "hard, stiff, rough, severe," from rigere "be stiff," from PIE *reig- "stretch (tight), bind tightly, make fast" (cf. Old Irish riag "torture," Middle High German ric "band, string"). Related: Rigidly.

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Online Etymology Dictionary, © 2010 Douglas Harper

rigidity in Medicine

rigidity

(rĭ-jĭdĭ-tē)
n.
  1. The quality or state of stiffness or inflexibility.rigor
  2. An aspect of the personality characterized by resistance to change.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.