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单词 constant
释义

constant

See also: Constant

English

Etymology

From Middle English constant, from Old French constant, from Latin constantem, accusative of constans, from constare (“to stand firm”). Displaced native Old English singal.

Pronunciation

  • (Received Pronunciation) IPA(key): /ˈkɒnstənt/
  • (US) IPA(key): /ˈkɑnstənt/
  • Audio (US)(file)

Adjective

constant (comparative more constant, superlative most constant)

  1. Unchanged through time or space; permanent.
  2. Consistently recurring over time; persistent.
    Synonyms: see Thesaurus:continuous
    • 2013 November 16, Schumpeter, “The mindfulness business”, in The Economist, volume 409, number 8862:
      The constant pinging of electronic devices is driving many people to the end of their tether. Electronic devices not only overload the senses and invade leisure time. They feed on themselves: the more people tweet the more they are rewarded with followers and retweets.
  3. Steady in purpose, action, feeling, etc.
    • c. 1580 (date written)​, Philippe Sidnei [i.e., Philip Sidney], “[The Second Booke] Chapter 3”, in Fulke Greville, Matthew Gwinne, and John Florio, editors, The Countesse of Pembrokes Arcadia [The New Arcadia], London: […] [John Windet] for William Ponsonbie, published 1590, OCLC 801077108; republished in Albert Feuillerat, editor, The Countesse of Pembrokes Arcadia (Cambridge English Classics: The Complete Works of Sir Philip Sidney; I), Cambridge, Cambridgeshire: University Press, 1912, OCLC 318419127, page 162:
      Both loving one fair maid, they yet remained constant friends.
    • c. 1599–1602 (date written), William Shakespeare, “The Tragedie of Hamlet, Prince of Denmarke”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, OCLC 606515358, [Act V, scene ii]:
      I am constant to my purposes.
    • 1700, [John] Dryden, “Theodore and Honoria, from Boccace”, in Fables Ancient and Modern; […], London: […] Jacob Tonson, […], OCLC 228732415:
      His gifts, his constant courtship, nothing gained.
  4. Firm; solid; not fluid.
    • 1659 December 30 (date written)​, Robert Boyle, New Experiments Physico-Mechanicall, Touching the Spring of the Air, and Its Effects, (Made, for the Most Part, in a New Pneumatical Engine) […], Oxford, Oxfordshire: […] H[enry] Hall, printer to the University, for Tho[mas] Robinson, published 1660, OCLC 633153238:
      If […] you mix them, you may turn these two fluid liquors into a constant body.
  5. (obsolete) Consistent; logical.
    • c. 1601–1602, William Shakespeare, “Twelfe Night, or VVhat You VVill”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, OCLC 606515358, [Act IV, scene ii]:
      I am no more mad than you are: make the trial of it with any constant question.
  6. (computing, complexity theory) Bounded above by a constant.
    constant time   constant space

Synonyms

  • (unchanged through time or space): nonchanging, unaltering, unvarying; see also Thesaurus:changeless

Derived terms

  • constant morphism
  • constant of integration
  • constant speed drive
  • constant-speed propeller
  • constant-velocity
  • constant-wear garment

Translations

The translations below need to be checked and inserted above into the appropriate translation tables. See instructions at Wiktionary:Entry layout § Translations.
Translations to be checked

Noun

constant (plural constants)

polynomial degrees
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  1. That which is permanent or invariable.
  2. (algebra) A quantity that remains at a fixed value throughout a given discussion.
  3. (sciences) Any property of an experiment, determined numerically, that does not change under given circumstances.
  4. (computing) An identifier that is bound to an invariant value; a fixed value given a name to aid in readability of source code.

Derived terms

  • absolute constant
  • acid dissociation constant
  • Apéry's constant
  • Archimedes' constant
  • Avogadro constant
  • Avogadro's constant
  • Boltzmann constant
  • Boltzmann's constant
  • Brun's constant
  • Chaitin's constant
  • constant function
  • constant of integration
  • constant problem
  • Conway's constant
  • cosmological constant
  • Coulomb's constant
  • de Bruijn-Newman constant
  • dielectric constant
  • Dirac constant
  • Dirac's constant
  • Einstein constant
  • Einstein's constant
  • equilibrium constant
  • Euler-Mascheroni constant
  • Feigenbaum constant
  • fine structure constant
  • fine-structure constant
  • Fransén-Robinson constant
  • fundamental constant
  • gas constant
  • Gelfond's constant
  • gravitational constant
  • Hubble constant
  • Hubble's constant
  • Landau-Ramanujan constant
  • lattice constant
  • logical constant
  • Ludolph's constant
  • Madelung constant
  • physical constant
  • Planck constant
  • Planck's constant
  • propositional constant
  • Ramanujan's constant
  • rate constant
  • reaction rate constant
  • Rydberg constant
  • screening constant
  • separation constant
  • shielding constant
  • solar constant
  • Sommerfeld's constant
  • spring constant
  • Stefan-Boltzmann constant
  • Stieltjes constant
  • symbolic constant
  • time constant

Translations

The translations below need to be checked and inserted above into the appropriate translation tables. See instructions at Wiktionary:Entry layout § Translations.
Translations to be checked
  • constantly (adv)
  • constancy (n)

See also

  • (computing) literal

Catalan

Etymology

From Latin cōnstāns.

Pronunciation

  • (Balearic, Valencian) IPA(key): /konsˈtant/
  • (Central) IPA(key): /kunsˈtan/
  • Rhymes: -ant

Adjective

constant (masculine and feminine plural constants)

  1. constant
    Antonym: inconstant

Derived terms

  • constantment
  • inconstant
  • constància

Noun

constant f (plural constants)

  1. constant

Further reading

  • “constant” in Diccionari de la llengua catalana, segona edició, Institut d’Estudis Catalans.
  • “constant”, in Gran Diccionari de la Llengua Catalana, Grup Enciclopèdia Catalana, 2023
  • “constant” in Diccionari normatiu valencià, Acadèmia Valenciana de la Llengua.
  • “constant” in Diccionari català-valencià-balear, Antoni Maria Alcover and Francesc de Borja Moll, 1962.

Dutch

Etymology

Borrowed from Middle French constant, from Latin cōnstāns.

Pronunciation

  • IPA(key): /kɔnˈstɑnt/, /ˈkɔn.stɑnt/
  • Hyphenation: con‧stant
  • Rhymes: -ɑnt

Adjective

constant (comparative constanter, superlative constantst)

  1. constant, invariable
  2. constant, continuous, unceasing

Inflection

Inflection of constant
uninflectedconstant
inflectedconstante
comparativeconstanter
positivecomparativesuperlative
predicative/adverbialconstantconstanterhet constantst
het constantste
indefinitem./f. sing.constanteconstantereconstantste
n. sing.constantconstanterconstantste
pluralconstanteconstantereconstantste
definiteconstanteconstantereconstantste
partitiveconstantsconstanters—

Derived terms

  • constante
  • constantheid

Descendants

  • → Indonesian: konstan

French

Etymology

From Latin constans.

Pronunciation

  • IPA(key): /kɔ̃s.tɑ̃/
  • audio(file)
  • Homophone: constants

Adjective

constant (feminine constante, masculine plural constants, feminine plural constantes)

  1. constant

Derived terms

  • constamment
  • constance

Further reading

  • “constant”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.

Latin

Verb

cōnstant

  1. third-person plural present active indicative of cōnstō

Romanian

Etymology

From French constant, from Latin constans.

Adjective

constant m or n (feminine singular constantă, masculine plural constanți, feminine and neuter plural constante)

  1. constant

Declension
Declension of constant
singular plural
masculine neuter feminine masculine neuter feminine
nominative/
accusative 		indefinite constant constantă constanți constante
definite constantul constanta constanții constantele
genitive/
dative 		indefinite constant constante constanți constante
definite constantului constantei constanților constantelor
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