rigid

[rij-id]
See more synonyms for rigid on Thesaurus.com
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.

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 for rigid

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

Antonyms for rigid

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 of rigidity

Historical Examples of rigidity

  • 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
adverb
  1. completely or excessivelythe lecture bored him rigid
Derived Formsrigidly, adverbrigidity or rigidness, noun

Word Origin for rigid

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).

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.

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.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.