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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 rigid

Contemporary Examples

Historical Examples

  • They were hard-featured men, sallow of complexion, rigid in their looks.

  • The rigid lines of black that crossed it were bars—prison bars.

    Within the Law

    Marvin Dana

  • He pointed to the rigid form of the dead man, lying there so very near them.

    Within the Law

    Marvin Dana

  • The moral tension, which had held her hopeless and rigid, gave way.

    Tiverton Tales

    Alice Brown

  • Almamen marked his emotion with an eye and lip of rigid composure.

    Leila, Complete

    Edward Bulwer-Lytton


British Dictionary definitions for rigid

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 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