constantとは 意味・読み方・使い方

発音

• (Received 発音) IPA^(key): /ˈkɒnstənt/
• (米国発音) IPA^(key): /ˈkɑnstənt/

形容詞

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

同意語

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

派生語

名詞

constant (複数形 constants)

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.

派生語

関連する語

• constantly (adv)
• constancy (n)

参考

• (コンピューター) literal

Latin

動詞

cōnstant

1. third-person plural present active indicative of cōnstō